11 best heater for fish tank 3 gallon

• ★【Betta Heater】This Fish Tank Heater should be 100% submerged into water, Ideal for small glass or acrylic desktop aquariums up 1 to 6 Gallons, not suitable for less than 1 gallon tank.
• ★【Quick and Easy Installation】:Vertical or horizontal placement using, Aquarium heater automatic temperature control 78℉, no need to adjust temperature, easy to operate, fishes happy.
• ★【How it Works】: Plug in, red light turns on, the heater will start working until water temperature up to 78°F, and red light off, then the green light will turn on, heater stop working and keeping constant temperature 78°F. Accuracy：±3°F
• ★【Note】: Do not operate or leave product plugged in when it is outside of water, Children should be use this heater under adult's guidance.
• ★【SATISFACTION GUARANTEED】Our Aquarium Heater is built with durability in mind and safety for every design. In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement. 12 Month Warranty and 24 Hour Professional After-sales Service.

User questions & answers

Question:	How do you change the fishes water with this in it
Answer:	I just turn mine off when I change the water
Question:	Can you install two of this in a 10 gallons tank
Answer:	I would this so as long as they are as far away as possible from the school other. But by the time you buy 2 of these you could just buy a bigger one for your tank.
Question:	Will this overheat a one gallon tank
Answer:	I bought it for my 1.5 gallon tank and it made my tank 93 degrees it does not shut off like it's suppose too!
Question:	I want this for a tank with a beta - no water current. Is this going to work you think
Answer:	We have a pump, but our Beta sits right on top on the heater and is fine.

Product features

Maintenance

This heater is free maintenance item, for the good of heater function and service life, we suggest:

• Check the heater working status regularly, if any strange signs,please plug off immediately.
• Clean the heater suction cups regularly (3 months)with 140℉ warm water and soak it for a while.
• If you found any soil or moss things covered on the heater, please plug off the heater and clean it with fresh water after a few minutes later, especially the heating part stains. Do not use any other liquid to clean the heater, it may damage the heater

• ★ Temperature range: 59°F~94°F, display Fahrenheit °F, this heater is designed for1~10 gallons tank.
• ★ Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating.
• ★ Touch button, cyclic adjust temperature , easy to use and Safety.
• ★【Note】:this heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.
• ★【SATISFACTION GUARANTEED】Gain the confidence to go hard with us! Our Aquarium Heater is built with durability in mind and safety for every design, In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement. 12 Month Warranty and 24 Hour Professional After-sales Service.

User questions & answers

Question:	The heater is displaying EE what does that means? It came without any instructions
Answer:	They don’t have a physical store.
Question:	What type of plastic is it made of
Answer:	Not an issue we would be happy to fulfill this request. Please email us at [email protected] after placing the order letting us know your request!
Question:	Can i adjust it to set to 78 degrees F for a betta fish
Answer:	I believe the traditional answer is one inch of fish per gallon of water, so, it depends on how big these are.
Question:	No directions came with my heater....How can I adjust the temp so that it actually sticks
Answer:	A 10-15 gallon tank would be smallest we would recommend.

Product features

The Greatest Advantage

Multi-function LED digital display heater: Use advanced IC technology,

Oval appearance, large LED display.

Clearly and accurately displays the water temperature,

highlights your aquarium.

No need to buy another thermometer.

The Most Safety Operation

How to adjust temperature:

There is a regulator connect with power cord, just press the button after heater has been installed,

and you can will see the LED display shows °F，

press the button until you see the display shows your expecting temperature (display 59~93℉ in cycle by),

and then leave it for heating up.

For example:

Expecting temperature is : 80℉ Heater display shows: 70℉ Then, Press the regulator 10 times,

then you will see the display shows from 70 to 80°F.

When you see the display shows 80°F，

then leave it for heating.

Advanced Waterproof

Highest waterproof level: IPX8

Built-in Temperature Control Chip

Built-in temperature control chip

External Touch Button

External Touch button, cyclic adjust temperature , easy to use and Safety.

Small Size

Heater Ideal for 1-10 gal fish tanks. Heater Size: 2.5 x 1.5 x3.5 inch

Product description

Aquatic 5 Watt Flat Heaters provide warmth for small tropical fish and are designed for glass or acrylic desktop aquariums up to 2.5 gallons. They are completely submersible, easy to install and efficiently warm aquarium water. Suctions cups are included so you can mount the heater to the bottom or side wall of the aquarium. Be sure to choose the appropriate size for your aquarium. Do not operate or leave product plugged in when it is outside of water.

• Fully submersible
• Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank
• Quick and easy installation
• Shatterproof construction
• Can be used with glass or acrylic enclosures
• Note: Do NOT operate or leave product plugged in when it is outside of water
• 5 watt works best for up to 2.5 gallon fish tanks

User questions & answers

Question:	How long before I can put my fish in the water
Answer:	Hi Michael! There are (4) 7" sections.
Question:	Why does my fish hide and go to the bottom of the tank when I turn it on
Answer:	3/4 inch
Question:	Does this work in a 3-gallon bowl although it says for up to 2.5-gallon bowl
Answer:	A lot of occurrences could be causing buildup within your tank, such as having the lights on for too long. We invite you to reach out to us directly at 1-888-255-4527 so we can gather additional details from you and provide proper assistance.
Question:	Got this and didn't work. was sent a second one and doesn't work either. no change in water temperature whatsoever and is only a 1.5 gallon tank
Answer:	The polisher uses an Aqueon Large Cartridge which should be replaced monthly. In the canister itself most of the media does not get replaced. The bottom tray is biological (bio balls and ceramic pieces) which unless there is physical damage do not get replaced. The top tray is a course media sponge which should be rinsed out and put back in and the middle is the charcoal which does need to be replaced no less than once a quarter. All of these replacement items are available from Aqueon. If you have further questions, I suggest you contact Aqueon Tech and Warranty at 888-255-4527 and they can give you personal answers to your questions

Product description

✅Your little Betta Fishes will be happy with your gift for it! Great!





✅Attention points:

In a long-term use, please regularly clean the water grass and impurities attached on the heater surface.

The heater is completely sealed so please don't disassemble it, that will make it permanently damaged.

We freely provide 1 year quality assurance for this product, we will be responsible for any product



✅Note!

It is designed to work under water only,

please NOT turn it on when it's outside water, as dry burning might lead to malfunction.

Please don't put it in the water if the wire or heater damaged

When there is a heater in the fish thak, do not put your hand in to the water



✅Functionality :

✅Material: ABS anti-scalding housing -40ºF~212ºF(-40℃~100℃), sandy quartz filler, MCH Alumina ceramic heating system

✅Waterproof: IP68: 47in / 120CM indefinite waterproof

✅Rated power: 25W

✅Rated operating voltage: 110V - 120V

✅Automatic constant temp:77℉ - 82℉ / 25℃ - 28 ℃ (±1℃)

✅Security protection systems: anti-scalding surface treatment, anti-explosion, anti-cracking

Applicable volume of fish tank water:under 5 gallons or 20 liters



✅Specifications:

Size: 5.3in x 1in x 0.7in / 13.5cm x 2.5cm x 1.7cm

Weight (about): 5.3oz / 150g



Package Include:

1*Mini Fish Tank Heater

2*Aquarium Decor Artificial Plant

1*Stick-on Thermometer Strip





If you want to know more details or have any questions, please Feel free to contact us.

We are always at your service.

• Betta Fish's Favorite Gifts: ZEETOON Fish Tank Heater Suitable for all kinds of aquarium pets, Betta, tropical fish, goldfish, ornamental fish and turtles, can work in both brine and fresh water. Your little fishes and turtles will no longer fear the winter! 2 Aquarium Decor Artificial Plants make their homes beautiful not boring. 1 Stick-on Thermometer Strip, Eliminate your worry of not confirming the heating temperature
• Mini Sized- Fully submersible compact betta fish heater Gift with 2PCS Aquarium Decor Artificial Plant. Specific perfect for mini aquarium under 5 gal/20L.for all shapes and materials fish tanks, whether it is glass or plastic, all can be used. ZEETOON Mini Heater provide a constant warm for your pet fish to stay healthy, suitable both for fresh and salt water. intelligent temperature regulate, very easy to use.
• Smart Control: Adopted intelligent circuit board, with a precise sensing probe and thermostat heating system. Unlike other conventional heaters, need you to manually adjust the temperature. Our Smart Aquarium Heater just plug the power cable then it will work. It works will automatically turn on/off to achieve the setting temperature constantly and stably 73ºF-82ºF(25℃-28℃), Energy-saving life, you will be at your fingertips!
• Smart Thermostat: ZEETOON Mini Heater different from a manually adjusted heater. Our heater automatic temperature regulate on 73ºF-82ºF(25℃-28℃) , no need to set. Prevent electric shock and burns. Keep you and your family safe. Position it near a strong water flow for whole aquarium are in the same temperature. The outlet of filter is ideal. When there is a heater in the fish thak, do not put your hand in to the water
• High Quality: Made by heat resistant ABS housing, sandy quartz filler and MCH Alumina ceramic heating system, anti explosion & cracking, it is scald-preventing for your pets and safe operation for you, safer and more stable to use. This product have certificated by CE, ROHS, FCC, UL certifications. We provide 1 year quality assurance for this product, we will provide replacement items for any product problems within 1 year after your purchase it.

User questions & answers

Question:	Why can’t you put your hand into the aquarium when there’s a heater in it
Answer:	The three plastic plants that come with the heater are a green grass a purple orcid style and and a red flowering plant
Question:	I have a 6.5 gallon tank. Can I use 2 of these, or would 1 be sufficient
Answer:	I do. I have a tank thermometer a few inches from it and it regulates between 78 and 82 degrees Fahrenheit. It will kick on and shut off on it's own
Question:	Can u leAve it on all night
Answer:	Yes, you can attach it to the inside wall of the aquarium with your fish & snail. Be sure it’s fully submerged before you plug it in. It heats up gradually, and my beta loves it!
Question:	The stick on thermometer is it in Celsius or Farenhite
Answer:	My Betta loves to curl up around the top of it. It works great! Has never harmed my Better or my snails.

Product description

PGFUNNY 25w Aquarium Heater, Betta Fish Heater for 3 to 5 Gallon Betta Tank Heater Fully Automatic Temperature heater with Protective Guard 

★Information:

Suitable for all shapes and materials fish tanks, whether it is glass or plastic, all can be used.

Dedicated designed for small and mini-sized aquarium under 3 to 5 Gallon Tank, intelligent temperature regulate, very easy to use.

Suitable for all kinds of aquarium pets, tropical fish, goldfish, ornamental fish, and turtles, can work in both brine and fresh water.

★Attention points:

For long-term use, please regularly clean the water grass and impurities attached to the heater surface.

The heater is completely sealed so please don't disassemble it, that will make it permanently damaged.

Dry burning will lead to malfunction, please put it in water totally and then plug in it. 

To protect the heater, after plug off,  please keep in water and wait 10 minutes to ensure the heater has cool totally, and then take it out.

★It is designed to work underwater only, please NOT turn it on when it's outside water, as dry burning might lead to malfunction. Please don't put it in the water if the wire or heater damaged

★Functionality :

★Material: Nylon & Glass Fiber

★Waterproof: IP68: 47in / 120CM indefinite waterproof

★Rated power: 25W

★Rated operating voltage: 110V - 120V

★Automatic constant temp:77℉ - 82℉ / 25℃ - 28 ℃ (±1℃)

★Security protection systems: anti-scalding surface treatment, anti-explosion, anti-cracking

Package contents: 1*Mini Fish Tank Heater+ 1 fish tank thermometer sticker

PGFUNNY 25W Aquarium Heater, Fish Tank Heater for Betta Smart Thermostat,

• 【Fully Automatic Temperature Control Chip】: Submersible Aquarium heater works in intermittent operation mode, temperature regulate between on 77℉ - 82℉, Unlike the traditional manually adjusted fish tank heaters, no need to set. and will automatically turn on/off to achieve the setting temperature constantly and stably, Energy-efficient.
• 【Suitable for 3-5 Gallon Tank】: Fish Tank Heater 25 watt powerful and slim design fit for small fish tank. The Way of Measure Watt Heater for Your Fish Tank Needing: Watt=(Tank's Length*Wide*Water Height) /1000*2.
• 【Advanced Materials】: sturdy engineering plastic. It has an anti-explosion, anti-scalding function, high-temperature resistance, and high safety. Suitable for aquarium pets such as turtles and fry. Length - 5.35 inch, Width - 0.9inch, Thickness - 0.63inch.
• 【Come with Thermometer Strips】: By using the Thermometer Stripe, you will be able to monitor. An easy to identify blue color shows the current temperature of your aquarium water. Temperature Stripe is for reference only. Note: The temperature strips should stick on the outside of the fish box and level with the heater. due to the different materials of glass, the shown temperature may be delayed.
• 【Quality Assurance】: This product fish tank heater has certificated by CE, ROHS, FCC, and UL1018. Anti-explosion, Waterproof, Scald-preventing, safe operation for pet betta fish. Working power 25w, frequency: 50/60Hz, voltage: 110-120V, waterproof rating IP68.

User questions & answers

Question:	What does the red light mean? New heater, had a red light for a few minutes but then no light and the water temperature hasn’t warmed up at all
Answer:	For mine, the red light means the heater is activated. When it turns off, it means the water has reached the maximum set temperature (not adjustable) of the heater, probably in the low 80s.
Question:	Does this have any manufacturers warranty
Answer:	I don’t recall a warranty however I used it along with enclosed Temperature gage for 3 days. When temperature never registered I returned for full refund
Question:	How does the temperature sticker work? The directions are not clear
Answer:	It attaches to the aquarium outside wall and highlights the water temperature
Question:	What is the best location to place the heater in a square tank
Answer:	I prefer to place my heaters next to the filter so that the water movement spreads the heat throughout the tank

Product features

Why Choose us?

Aquarium Heater built-in automatic temperature control chip. Automatically adjust the temperature to 25-28 degrees Celsius.Unlike the traditional manually adjusted fish tank heaters, no need to set.

Durable, explosion-proof and crack-proof, suitable for aquarium pets such as turtles and fry. The surface is protected from burns, high temperature resistance, no bursting of water, and high safety.

Product description

About Bnzaq Aquarium Heater

The aquarium heater is made of shatterproof glass that not easy to broken.The temperature is adjustable(68°F~93°F) that suit more species of fish and let your fish enjoy more comfortable environment.

Package Information:

• Aquarium heater x 1

• (FREE) Artificial aquarium plants x 3

Specification:

25W：7.8"

50W：7.8"

100W：10"

150W：10"

200W：11.8"

300W：13.1"

Heater Capacity:

25W:within 7 gallons tank

50W:7~15 gallons tank

100W:15~30 gallons tank

150W:30~50 gallons tank

200W:40~60 gallons tank

300W:50~80 gallons tank

• [PREMIUM SHATTERPROOF GLASS]Made of shatterproof glass and BPA-free plastic.Bnzaq aquarium heaters are fully submersible and safe for fish without any toxic substance producing.3 FREE artificial aquarium plants as ornament in your tank.
• [NO LONGER CHILL YOUR FISH]Automatically regulate and maintain water temperature，imitate the original ecological environment for your tropical fish.Provided fish with warm water environment.Perfect to apply to fresh and salt water.
• [ADJUSTABLE TEMPERATURE]Temperature range: 68°F~93°F.25W heater:suitable for fish tank within 7 gallons,Length:7.8".Easy to adjust temperature by the aquarium heater that suit more species of fish.
• [AUTOMATIC CONSTANT TEMPERATURE]When water temperature reaches set value,the indicator light will be OFF and the heater will automatically stop heating.The heater will automatically start heating and indicator light will be ON if water temperature is low.You could place heater horizontally or vertically.
• [ATTENTION]Please place the heater near place (filter or pump) of water flowing to keep more even water temperature.Unplug the heater 30 minutes early when changing the water for the fish tank.

User questions & answers

Question:	How long will it take my 25 watt heater take to fully heat my 5.5 gallon tank to 78? Also is the light supposed turn of and on every 5 to 10 mins
Answer:	https://www.vendomeava.com/by-brand/yamaha/Yamaha.html
Question:	how much of the heater can be out of water
Answer:	The Yamaha RX-V377 receiver has a subwoofer pre-out connection (signal is not amplified), and the Yamaha YST-SW315 sub has a 250-watt amp. So, yes, it should work just fine. To connect the sub to the receiver, you just need a subwoofer cable (single RCA cable).
Question:	Can the black cord be submerged
Answer:	It lights up green when the subwoofer is turned on.
Question:	The light on my 25w heater isnt warming uo my 5 gallon tank
Answer:	It's a speaker not a desk. I'm sure you could lay a tablet atop the speaker but you'll be pressing the buttons accidentally. All the buttons are on top of the speaker & they're touch sensitive. I never put anything on mine because the buttons are too touch sensitive.

• ★【Quartz glass heater】: The heating device is made of heat-resistant quartz glass, explosion-proof and strong thermal conductivity. It can be used for 1-5 gallon glass or acrylic fish tanks.
• ★【Easy to operate】: This heater is different from traditional heaters. It is designed with an external controller for temperature display and temperature adjustment, which can freely adjust the temperature you need (68°F-93°F).
• ★【Intelligent temperature control】: The heater effectively maintains the temperature you preset before, and stops heating when the water temperature reaches the preset temperature, and restarts heating when the water temperature is lower than the preset temperature by 2-3°F.The red light on the LED screen indicates that the heater is heating, and the blue light indicates that the heater has finished heating and is in a constant temperature state.
• ★【Note】: The heater needs to be fully submerged, the external controller is not waterproof, and children need to be used under the supervision or guidance of adults.
• ★【SATISFACTION GUARANTEED】Our Aquarium Heater is built with durability in mind and safety for every design. In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement. 12 Month Warranty and 24 Hour Professional After-sales Service.

User questions & answers

Question:	The hearter reading seems to be different than my aquarium thermostat. Anyone else got same problem
Answer:	Yes! It’s always different. It’s always warmer than the thermometer. But my fig and plants are doing great so I guess it’s okay.
Question:	Can this be kept on
Answer:	ABSOLUTELY! It is designed to be plugged in, and it monitors the temperature 24/7.
Question:	Anyone try a protective guard/cover on this? Concerned re fish safety/scalding; thnx
Answer:	I don't believe the heater gets hot enough to scald the fish. The heater only lets the water get 2-3 degrees cooler than the setpoint (if I set the temperature to 75 F, the heater will turn on at 72 or 73 F), so it doesn't need to work hard to get the water up to temperature. Also, water is an excellent conductor of heat, so if the outside temperature of the heater is hot enough to scald the fish, then all the water is probably hot enough to scald the fish.
Question:	Why is the heater blinking ll? i just plugged it in this morning and it is warming but blinking red ll. is it defective? please let me know. thank
Answer:	If you click though all the temperature options, and go back to desired temperature, it should stop flashing LL and show you the temperate it is at instead

Product features

How to use the external controller:

• Plug in, the controller LED lights on, press the button and switch it continuously until the LED display shows your expecting temperature (From 68~93℉ ), and wait 3 seconds for system confirmation, then heater will start heating up to your preset temperature.
• Red lights means the heater is on heating mode, when heater heating up to the preset temperature, blue lights on, and heater will stop heating (Restart heating when temperature less than preset temperature)
• Operation for example: Plug in and LED display shows preset temperature 68℉, you want adjust it to 78℉, then press the button 10 times continuously, LED display will shows 78℉, and wait 3 seconds flashing, then setting fishined, heater will start heating from 68℉ to 78℉.

Maintenance:

This heater is free maintenance item, for the good of heater function and service life, we suggest:

• Check the heater working status regularly, if any strange signs,please plug off immediately.
• Clean the heater suction cups regularly (3 months)with 140℉ warm water and soak it for a while.
• If you found any soil or moss things covered on the heater, please plug off the heater and clean it with fresh water after a few minutes later, especially the heating part stains. Do not use any other liquid to clean the heater, it may damage the heater

Cautions:

• Please install and use this heater under rated voltage conditions(110V-120V/60Hz).
• This heater is designed for small fresh/sea water tanks, please do not use it in chemical water or any other heating purpose, it may damage the heater.
• Children should be use this heater under adult's guidance.
• IPX8 design, non-detachable, do not disassemble it, otherwise it will damage the heater.
• To ensure the heater normal functions and safety concerns, heater should be fully subermerged.
• Fish tank temperature is very easy to affected by the room temperature, therefore it makes the water temperature inaccurate, normally ± 2℉ differency.
• To help the heater works more efficiently, please use the heater in a circulating water tank, still water will make the heater area water temperature higher than other side.

External Controller

External LED temperature display and Touch button, cyclic adjust temperature , easy to use and Safety.

Quartz glass heater

The heating device is made of heat-resistant quartz glass

Suction cup

Strong suction cups attached can suck the heating rod on the fish tank wall.

Specification

Power : 25Watt

Voltage: 110-120V/60HZ

Cable Length: 5.0 ft

• Fish Tank Thermostat: 50W aquarium heaters suit for 5-15 Gallon fish tank. Voltage:110V, Power cord is 4.59ft, Max deep water immersion 20 inch/1.7 FT
• Correct installation: Stick the heater vertical onto the tank side near the water intake or on the way of water flow.（This way the heater can quickly sense the water temperature and make adjustments automatically）, Keep the aquarium heater fully submerged in water
• Fully Automatic Control: Design with External Temperature Controller, Temperature Range is 68 ºF-90 ºF, when water temperature achieve the setting temperature, heater will automatically stop heating, when water temperature is lower than the setting temperature, heater will automatically start heating
• Quartz Tube Safety Protection: Made of heat-resistant milky quartz Glass and UL-Approved Power Cord, Controller IPX4, Heater IPX8 that make it pretty shatter-proof and Explosion-proof and prevents electricity leakage, service life can be 3 years or more
• Notice Please: Before you clean the aquarium or change water, pls must cut off the heater power, after 10 minute cooling then take out the heater and regularly clean the scale on the heater

User questions & answers

Question:	Can this heater set the temperature accurately
Answer:	The best way to control the temperature more accurately and prolong the service life of the heating rod: First, keep the aquarium heater fully submerged in water, Second, place the heater near the water inlet or the side with strong water flow, this way the heater can quickly sense the water temperature and make adjustments automatically Third, regularly clean the scale on the heater Fourth, Before you clean the aquarium or change water, pls must cut off the heater power, after 10 minute cooling then take out the heater Four simple operations make the heater temperature control precise and extend the life, Hope useful to you!
Question:	If my fishes were sick, how much temperature i set
Answer:	If so, you need set temp between 30-31℃), and add some sea salt.Do not set exceed 4 degrees Celsius each time. fish can't stand such a large temperature difference.
Question:	Will this work on glass and plastic aquarium
Answer:	this work on glass and plastic aquarium In addition, you need to find a fish tank heater that matches the capacity of the tank
Question:	Ok, so what does it mean to not put your hand in the water when heater is on? If it could hurt my hand what will it do to my turtles
Answer:	This is a question worth discussing! First of all, we can guarantee that the most important thing is that this fish tank heater has a three-layer leakage protection.It means that if it leaks electricity, it will automatically cut off the power immediately, so the heater of the water tank will be shut down immediately, which will not threaten human life. When the heater is working normally, you can put your hands in the water tank, but we do not recommend users to put their hands on the heater, because some users place the heater in a location where the water flow of the water tank is weak or place the heater on the edge of the water tank for the ornamental purpose of the fish tank. In this way, the temperature sensing range of the heater will be relatively small, which can easily lead to a large temperature difference in the fish tank. When touching the heater under this condition of use, it is easy to burn hands Therefore, we recommend that the heating conditions are: First, the heater needs to be completely immersed in water for the temperature sensing system to work normally. Second, The heater should be placed in a position where the water flow of the fish tank is strong, so that the heater can quickly adjust the temperature of the entire water tank and better protect the fish. Such discussions are always meaningful!

Product features

Q:Why does the heater have yellow spots or loose quartz?

A:

• The above phenomena do not affect the use of the heater,
• The reason for the yellow spots is that the milky white quartz tube of the heater is heated.
• Quartz is loose due to expansion and contraction by heat.

Q:Why is the temperature control inaccurate after using the heater for a period of time?

A:

• Affected by cold weather, the heater will produce scale when working in the water for a long time, and the scale attached to the heater will affect the temperature sensing system of the heater and cause the heater temperature to be inaccurate.
• Therefore, we have recommended users to clean the heater's scale regularly

Q:Why is the heater required to be installed vertical where the water flows?

A:

• First, the water in each part of the water tank flows through the heater, so that the heater quickly detects the water temperature of the entire water tank and automatically adjusts it to the set temperature
• Second, the water flow continuously impacts the heater, which makes the temperature of the heater diffuse faster, and avoids the heating rod from scalding the fish due to the high temperature.

Anti-Slip Silicone Sucker

Strong suction cups TIGHTLY FIX the heater to the tank, never worry about slipping.

Explosion-proof Quartz Tube

Made of durable milky quartz tube, High-heat resistance; Anti-cracking and Non-friable, better than normal glass.

External Temperature Regulator

Precise temperature dial from 68 to 90°F, temp exactness is within 1 degrees Celsius.

Aquarium Heater 50W

• Boxtech 50W aquarium heaters suit for 5 - 15 Gallon fish tank.
• Voltage:110V
• Power cord is 4.59ft

Aquarium Heater 100W

• Boxtech 100W aquarium heaters suit for 10 - 30 Gallon fish tank.
• Voltage:110V
• Power cord is 4.59ft

Aquarium Heater 300W

• Boxtech 300W aquarium heaters suit for 30 - 80 Gallon fish tank.
• Voltage:110V
• Power cord is 5.57ft

• ★【25 Watt Heater】： This Aquarium heater is suitable for 1 to 5 gallons aquariums, Length - 6.8 inch,voltage 110-120V, power cord is 4.0 ft, please choose the right wattage aquarium heater according to our size chart.
• ★【Temperature range】: 63°F~95°F , It is very easy to adjust the temperature you need, we also deliberately give each customer a free diving thermometer, you can observe the water temperature of the fish tank at any time.
• ★【Intelligent temperature control】： Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating. Furthermore, Automatic safety shut-off feature, and overheating protection.
• ★【Note】: 1. Aquarium heater is 100% submersible use only, during its heating time, heater must be 100% submerged into the water.,Please unplug the power supply when cleaning the fish tank or aquarium water changes. 2. Heater rod is suitable for people over 16 years of age. Children or minors should be under adult guidance or supervision.
• ★【SATISFACTION GUARANTEED】： Gain the confidence to go hard with us! Our Aquarium Heater is built with durability in mind and safety for every design, In the remote possibility that you’re not satisfied with our product, just contact us, and we will gladly give you a new Aquarium Heater replacement. 12 Month Warranty and 24 Hour Professional After-sales Service.

User questions & answers

Question:	Can I use a short extension cord with this 25 watt heater because the port is so short
Answer:	All of my fish tank items are connected to a surge protected extension cord. This heater is one of the items plugged into it.
Question:	Does this heater come with suction cups
Answer:	Yes
Question:	Are their any directions to put the heater in
Answer:	They have directions right on the side of the box when it ships. Pretty much the heater has to be fully submerged
Question:	Has anyone else experienced condensation in the display? it makes it very hard to read. does anyone know how i can stop this from happening
Answer:	Move the display further from the aquarium

Product features

FREESEA Aquarium Submersible Heater

• 1.Temperature range: 63°F~95°F , It is very easy to adjust the temperature you need.
• 2.Automatic constant temperature function, when water temperature reaches to specified temperature value, heater will automatically stop heating, when water temperature is lower than the set temperature, heater will automatically start heating.

100% is submersible heater, and it should be installed on the inner side of fish tank.

100% is submersible heater, and it should be installed on the bottom of fish tank.

The water level of fish tank cannot very low, as it is easy for heater to exposed on water.

It is forbid for exposing some main body part of heater on water when using.

Product description

Feature:

1) FULL Submersible heater, made of shock resistant and shatter proof premium Quartz Glass for fresh or sea water.

2) Voltage AC 110-120V. Temperature can be adjusted between 20-34℃, 68-94℉. You can press the 'SET' key to shift degree unit between Celsius and Fahrenheit

3) On/Off indicator light for at-a-glance monitoring. Safety control protects against running dry

4) The heater will automatically turn off when water level dips too low

5) Aquarium heater with LED digital display, IP68. Control Accuracy: ±2°F

6) The length of cable is 5.4 ft.



Note:

For better experience and safety, please carefully read and follow the user manual.

Don’t bury the heater in sand or mud.

Please don't plug in before the heater is well installed.

If you want to clean the fish tank or take out the heater, please disconnect power and wait for 30 MINUTES to cool down.



Package included:

1* Submersible Aquarium Heater

1* User Manual



Any questions, please feel free to contact us. Our customer care team are always here to help you.

• Durable Aquarium Heater - This aquarium heater is made of premium thickened Quartz Glass, double seal material, advanced design to ensure safe operation. It has explosion-proof function while being also shatterproof and waterproof.
• Wide Temperature Range - The temperature of the heater can be adjusted between 20-34℃, 68-94°F. It is suitable for fresh or sea water and great for many kinds of aquariums, fishes and amphibious turtles.
• Easy Viewing and Safe Adjusting - It is easy and safe to adjust temperature by the external controller and the temperature will be shown on the LED screen of the heater.
• Intelligent Temperature Control - It can ensure the temperature constant at the set point as it can adjust heating power automatically if there is any water temperature variation. So that it can avoid temperature mutation and protect fishes.
• It will stop heating when the water temp reaches to the set temp, restart heating when the water temp is 4℉ less than the set temp. The heater is working when the indicator light is red.

User questions & answers

Question:	How do you change the temperature, I only see 1 button on the cord
Answer:	Hi, the 50W heater is suitable for 2.5 gallon tank, for small tank, we suggest to set the temp 1F or 2F less than your designed temp, because the samll tank water will go 1F more up after it stop heating.

Product description

The Tetra Cube Aquarium Kit is the perfect starter aquarium for kitchens, dormitories, classrooms, and offices. The 3-gallon kit fits almost anywhere! The sleek and seamless tank is as transparent as glass and provides a unique and exciting panoramic view of your personal underwater habitat. The kit is equipped with a Tetra 3i filter to keep your tank clean and provide a perfect environment for your fish. The tank also features an LED light and a convenient feeding hole. You can count on the Tetra Aquarium Kits to be safe and reliable for years of enjoyment. The aquarium and cover are made of a clear plastic that resists cracking or shattering. Sign up for TetraCare to help you be more successful in your fish keeping endeavor. This is a free program with the purchase of these aquarium systems and provides on-line and over the phone support. Once you register, you'll receive specially timed e-mails to guide you through the first six months of your aquarium experience and beyond. Free direct access to our TetraCare Team is just a phone call away

• Equipped with a Tetra 3i filter to keep your tank clean and provide a perfect environment for small tropical fish.
• The tank features an LED light to show off your fish
• Lid features a convenient feeding hole. Material : Glass and acrylic
• Perfect for small tropical fish, goldfish or betta.
• 10" D x 10"W x 10.512"H
• Equipped with a Tetra 3i filter to keep your tank clean and provide a perfect environment for small tropical fish
• The tank features an LED light to highlight your fish

User questions & answers

Question:	Is it made of acrylic? Or plastic
Answer:	Plastic!!! Mine arrived cracked from the top and across the bottom. Not too happy with this.
Question:	does it come as shown with everything inside
Answer:	Most fish tanks do not come with gravel , decorations , allowing for obvious taste and requirement differences by the end user. This is not a “sad” thing as someone else noted , this allows you to use your imagination ! That’s what this hobby is all about, no ?
Question:	Is this tank big enough for a beta, dwarf frog and snail? Def want the beta if the tank is too small one of the others? Have no clue what I am doing
Answer:	I have discovered that ghost shrimp are a great combination with a betta that add zero bio load. A beta might try to mess with it at first, but it will leave it alone after a day or so. It will help keep your tank clean, and they naturally help the chemical balance of the tank by disposing of... "things". ;) Hope this helps. A snail has zero bio load as well. You only want ONE SNAIL. One... that's it. You don't want to have a million snails in your tank lol. Snails are great because they eat algae. They also come in lots of different shell colors. My wife has a 5 gallon with a large half moon betta (huge at this point), a ghost shrimp (also huge), a snail, and 5 small schooling fish. I can't remember the name of the schooling fish, but they are not tetras or guppys. She deliberately got the little fish because they are faster than the betta, so he can't eat them. Now they live in peace and he has accepted their presence.The shrimp and the snail are no brainers. If you get small fish make sure you get 3-5 in a small tank like this, and make sure you get fish fast enough to get away from the betta. Also make sure the fish don't have large flappy/hanging tails. The betta is very attracted to that stuff and will attack it relentlessly. Don't get less than 3, because small fish (normally schooling) don't like to be alone.
Question:	Which replacement filter cartridge do I buy for this filter system? Also, how often does it need changed
Answer:	Don't buy replacement. Replace filter cartridge resets tank cycle and then kills 🐠. Set your own media stages. I recommend bioballs or fluval on bottom, pillow stuffing, then ammonia sponge pad on top. All can be bought from amazon relatively cheap. Then simply keep your bio media and occasionally rinse them with tank water. Once every 3-6 months I change my sponge pad. 3-6 months I rinse my stuffing with tank water. Once a year I replace stuffing. This has my fish beautiful and happy like little monsters. Be careful where you get advice because sellers are in business to make money and sell more fish when they die

Product features

Tetra 3-gallon LED Cube Aquarium Kit

The Tetra Cube Aquarium Kit is the perfect starter aquarium for kitchens, dormitories, classrooms, and offices. The 3-gallon kit fits almost anywhere! The sleek and seamless tank is as transparent as glass and provides a unique and exciting panoramic view of your personal underwater habitat. The kit is equipped with a Tetra 3i filter to keep your tank clean and provide a perfect environment for your fish. The tank also features an LED light and a convenient feeding hole. You can count on the Tetra Aquarium Kits to be safe and reliable for years of enjoyment. The aquarium and cover are made of a clear plastic that resists cracking or shattering.