Best 10 Gal Aquarium Heaters in 2025

Fully submersible

Thermo safey control protects against running dry

Will automatically turn off when water level dips too low

Detect Temp Timely: With a built-in thermostat, it will automatically keep the water at the set temperature. The extra thermometer sticker allows you to detect water temp at any time.

Adjustable: Controllable temperature range from 68 °F to 93 °F (20-34 °C). Simply rotate the knob to freely regulate the temperature with deviations from ± 2 °F to ± 4 °F.

Heating Protection: Its indicator light turns red during working and automatically shuts off to stop heating when reaching the set temperature. No danger of overheating to your aquatics.

This 50 watt heater is for aquariums up to 12 gallons. Adjustable temperature dial allows you to set the temperature 1 degree with every click.

Thermal Switch automatically turns off as temperature rises above an internal preset and turns back on once it cools down.

The advanced heating element contains a mica core surrounded by a mesh heating element for superior heat transfer with enhanced durability

For 5-10 Gal Tanks: Measure 8.3 inches in length. Applicable for aquaculture and fresh, marine and tropical aquariums. Save your fish or plants from coldness to keep them vigorous.

Adjustable: Controllable temperature range from 68 °F to 93 °F (20-34 °C). Simply rotate the knob to freely regulate the temperature with deviations from ± 2 °F to ± 4 °F.

Detect Temp Timely: With a built-in thermostat, it will automatically keep the water at the set temperature. The extra thermometer sticker allows you to detect water temp at any time.

AQUARIUM HEATER: Submersible heater is designed to keep your aquarium at the optimum temperature.

AUTOMATIC THERMOSTAT: Electronic thermostat keeps water at a consistent 78 degrees.

INDICATOR LIGHT: The red light shows when water is heating; green indicates that the heater is on standby.

The Slim heater will increase the water temperature of mini aquariums up to 10 gallons by a few degrees compared to the ambient room temperature. The Slim heater can be used in glass, acrylic, plastic fish bowls and aquariums. Safe to use under gravel. Please note, Slim heaters are not suitable to be used in environments without water

Extra small slim fish tank heater 150 is a great choice for Betta fish and for fish tanks 5 to 10 gallons, measures 6.1L x 3.2 inches, 15 watt; Plug and Play universal fish tank heater; No temperature to set; slim heater provides warmth for betta fish without taking up much room

Heater can easily be placed submerged in water or even under the tank gravel; The 90 degree angle makes this great for Betta acquariums; Safe to use in glass, plastic and acrylic fish tanks

🐠【50W Compact Fish Heater】110-120V/60HZ square shape design small aquarium heater, fast heating for small fish tank. 50W tank heater is for 3-10gallon, 100W tank heater is for 10-20 gallon. The power cord is 5ft, long enough for use indoors. With 2 strong suction cups at the back side of the betta heater, it's easy to install it on to glass, acrylic or plastic tank

🐠【Shut off When Out of Water】BOEESPAT aquarium heater adopt newest technology, it is a fully submersible aquarium heater for fresh water and saltwater tank, when the top part of betta fish heater is out of water it will be forcibly stopped. After putting it in the water again, the fault disappears and normal operation resumes.It is a safe and reliable water heater tank

🐠【Small Aquarium Heater with External Controller】You can set the temperature outside the fish tank through the external controller, and the fish tank accessories of temperature sensing built in will cyclic heating the tank water automatically .Temp range from 65℉ to 93℉. Every time you set your betta fish heater, just press the button over and over until it reaches to your desired temp, then stop and wait the digit flashing for 3 times, then setting is done

【More Power and Longer Life】This heater is for 5-10 gallon fish tank, comparing to 25W, this 30W aquarium heater is more powerful and heating the same water in shorten time. Less working time provide longer life.

【Double Safety Protection】2mm thickened explosion-proof glass, 33% thicker than normal 1.5mm aquarium heaters, adding a specialized protective cover wrapping the heater tube, more durable and much safer for both human and aquatic creature.

【Application】30W suitable for 5-10Gallon fish tank, suitable for both fresh and marine water, suitable for all kinds of fish, turtle and plants. Size: 7.5in(19cm) in Length.

Heating uniformly and high heat transfer efficiency, protect your fish from the cold

Quartz glass material makes it extremely durable, wide range of applications and suitable for various aquariums

Powerful suction cups makes it easy to install and place, ensuring heater runs smoothly in the aquarium

Strong shatterproof polymer construction protect tank and inhabitants from damage

Preset temperate requires no adjustment

Waterproof, fully submersible design allows easy positioning inside aquarium

🔥【25W Small Submersible Heater】Suitable for 1-5 gallon fish tank,Temperature Control Range 59℉-93℉,When the temperature is lower than the set value 1℉, the heater will automatically heat up, and it will automatically stop heating when the set temperature is reached.

🔥【External Controller and Built-in Thermometer】Fish tank heater with a built-in thermometer,display water temperature of the fish tank in real time,HD LED display,The red light when heating, red light off when the temperature is constant, and display error code when the heater fault.The controller is not waterproof, please do not put it into water.

🔥【Easy To Use】Set temperature by press the button until reach your desired temperature value.The display will flash the desired temperature value three times, then return displaying the current water temperature.Your setting is done.You can press the button persistently to display 59-93℉ in a cycle.

Fully submersible

Vertical or horizontal placement using suction cups that mount to the bottom or side wall of tank

Quick and easy installation

𝟮𝟱𝙒 𝘽𝙚𝙩𝙩𝙖 𝙏𝙖𝙣𝙠 𝙃𝙚𝙖𝙩𝙚𝙧: Length - is 6.8 inches, 110V/60Hz, Cord length is 4.0ft, Suitable for 1-5 gallons aquarium, IP 68 waterproof, anti-corrosion, please choose the right wattage aquarium heater according to our size chart

𝙏𝙚𝙢𝙥𝙚𝙧𝙖𝙩𝙪𝙧𝙚 𝙍𝙖𝙣𝙜𝙚 𝟲𝟯-𝟵𝟱℉: Adjustable aquarium heater for easy use, just turn the top knob to freely adjust the temperature you need. We also provide a free sticker thermometer for each customer, so you can observe the water temperature of the fish tank at any time

𝙃𝙤𝙬 𝙞𝙩 𝙒𝙤𝙧𝙠𝙨: Plug in the power supply and check whether the indicator is on. The yellow light means the heater is working. When the water temperature is lower than the set value, the fish heater will automatically start heating. When the water temperature reaches the set value, the heating will stop and the indicator lights off

SUPER MINI SIZE – This aquarium heater is SUPER SHORT in length – might be the shortest heater in the market! It is only a bit more than HALF of the length of the traditional aquarium heaters! The innovative super short length perfectly solves the headache of the fish keepers on the traditional aquarium heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F. 100 Watt for 10 - 20 Gallon tanks.

SUPER ACCURATE 1F – Thanks to the intelligent inverter technology, with the in-built chips the thermostat keeps the fish heater at a constant temperature at an accuracy of 1F much more accurate than the traditional knob-controlled fish heaters and you save your electricity expenses by 50%!

DIGITAL DISPLAY WITH DOUBLE TEMP. READINGS – This fish tank heater comes with an external thermostat with digital display that shows 2 readings – the current temperature and the set temperature – very easy to switch by pressing the SET button and you save an extra thermometer for current temperature measuring.

Safe Rugged Construction -- Built in shatterproof QUARTZ tube wrapped with two heating element mica plate and nickel wire, along with high-impact plastic housing, hygger submersible Aquarium Heater ensures the safety of your pets while maintaining proper temperature.

At-A-Glance Temperature Display -- heater rod shows real time water temperature and indicator light. It will be red when heating, green light when the proper temperature has been reached.

External Knob Controller Memory Function -- allows you quick set temperature without getting hands wet especially in winter, adjustable wide temperature range of 59°F to 93°F in 1-degree increments. Memories last setting when you unplug it to water change.

★10 Watt Aquarium Heater: Temperature range is 59-93F, for small glass or acrylic aquariums up 1 to 5 gallons, can be used for both fresh and marine water, ideal for fish tanks and turtle tanks. Please choose the right wattage aquarium heater according to our size chart

★Made with Premium Quartz: The aquarium heater is made of 2mm thickened quartz glass. This fish tank heater is resistant to explosion and corrosion, and protect fish and other livestocks from punching and scalding

★Dry Run / Overheating Protection: When the water temperature exceeds 95°F or when the warer level is lower than the minimum water level, the heater will stop heating, and the conrtoller will display an error code. Error code: HH-high temp; E1-out off water. Multiple protection, you are free from “cooking fish”!

【Automatic constant temperature, for 1-60 gallon tank】auomii aquarium heater is specially designed for mini fish tank for 1-60 gallon. The heating will be automatically stopped when the set temperature is reached. The rated voltage is 100-130V. Choose the right power of heater according to size chart.

【Easy to adjust, external temperature controller】Set the temperature via an external controller instead of submerging the hands in water and turning the dial. Avoid getting your hands wet or contaminating the tank. The temperature can be adjusted from 64 to 93°F with 1℉ accuracy because of Intelligent Frequency Conversion Technology

【Easy to install, ultra-small size heater】Thanks to the ultra-compact heater with powerful suction cup, it can be easily installed anywhere in the tank. This super small heater can be used for both saltwater and freshwater.

【EXPLOSION PROOF】Made of thickened quartz glass and not easy to crack.Fully submersible and safe for fish without any toxic substance producing.

【ADJUSTABLE TEMPERATURE】Set the temperature from 68°F to 93°F as you desired.Easy to adjust temperature that suits more species of fish.50W heater is suitable for 5~15 gallons fish tank,heater length - 7.9 inches.Please choose the heater according to our chart.

【SMART TEMPERATURE SENSING】Automatically regulate and maintain water temperature，imitate the original ecological environment for your fish.Suitable for both fresh and salt water.

🐟【DaToo D1 Aquarium Heater】: In the cold winter, what do we want most? The answer must be warm temperature, and so is our lovely fish. A warm water temperature can make our pet fish feel happy and full of vitality, it will like to swim around. How can we get a warm temperature? Don't worry, DaToo D1 aquarium heater can easily bring warm temperature to your beloved fish, so that this winter will no longer be cold!

🐟【Accurate Electronic Temperature Control】: Most traditional glass heaters use mechanical temperature control, but DaToo is different. DaToo creatively uses electronic chip temperature control, which makes the water temperature more accurate and stable. High sensitivity, easily reduce the temperature error to ±1.8°F. DaToo D1 fish tank heater, let your fish have a warm and comfortable winter immediately!

🐟【Easy To Set Temperature】: Just turn the knob on the top of the heater, you can easily set the temperature you need. (Temperature range is 63℉~89℉). When the heater is heating, the heating indicator will light up, and it will automatically turn on and off to keep the water temperature at the set temperature. Comes with a free sticker thermometer, you can know the water temperature at any time!

Submersible Heater: Applicable for 5-20 gallon aquaculture and fresh, marine and tropical aquariums. Save your fish or plants from coldness to keep them vigorous. Fix it on the tank wall with 2 adjustable suction cups.

Adjustable Temperature: Controllable temperature range from 68 °F to 93 °F (20-34 °C). Simply rotate the knob to freely regulate the temperature with slight deviations of ±3 °F.

Strong Protection: Its indicator light turns red during working and automatically shuts off when reaching the set temp. Come with a protective cover which always keeps the fish out. No danger of overheating to your aquatics.

[75W Submersible Aquarium Heater]-Cherlam aquarium heater is suitable for seawater and freshwater.Constant Temperature is 77℉. The 75W fish tank heater is suitable for fish tanks under 13GAL, and the power cord is 5.9Ft(70.8INCH) long, which is enough for indoor use.

[Comprehensive safety protection]-1.UL certification+FCC certification to ensure the safety of power supply and plug 2. When the aquarium heater leaves the water surface, the power will be automatically cut off to prevent dry burning. 3. When the target temperature is reached, the continuous heating will be stopped and the constant temperature will be maintained. 4.Plastic steel protective cover does not deformation,will not burn fish and turtles.

[Automatic Heating] The aquarium heater uses a nickel-chromium wire heating tube, with uniform heat transfer and fast heat exchange. When the red light is on, it is in the heating state. When it reaches 77°F, the green light turns on to stop heating. If the temperature of the water is lower than 77°F, the heater will automatically start heating.

🐠Mini Size Aquarium Heater: This small aquarium heater is only the size of your hand, measuring only 6.3x1.65x1.18 inch, perfect for 5-10 gallon(The user manual is inaccurate, please refer to this standard) small round glass tanks, acrylic tanks, nano tanks or betta tanks, with a unique look and mini size design that takes up little space and is easy to hide! Please choose the right wattage aquarium heater according to our size chart.

🐠Dual Temp Control Digital Display Controller: This small fish tank heater is equipped with dual relays and an intelligent heating constant temp system. It has two heating scales-℉ and ℃. The temperature control range is 59-93℉/15-34℃, and the temperature control accuracy is within 2℉. Controller Display the current temperature and set temperature, press the temperature control button to adjust the set temperature, press and hold the control button for 5-8 seconds to switch between ℉ and ℃.

🐠Intelligent Water Sensor and Prevent Dry Burning: This mini aquarium heater has a unique intelligent temperature and water sensor system, the heater will automatically stop heating when the heater temperature sensor is exposed to the surface of the water 5cm and current temperature will display “E1”. This tank heater will stop working when the water level is lower than the minimum water level or when the water temperature exceeds 93℉.

SUPER MINI SIZE - This aquarium heater is SUPER SHORT in length. It is only 4in/10cm, a bit more than HALF of the length comparing with the traditional fish heaters! The innovative super short length perfectly solves the headache of the fish keepers on the large size of the traditional heaters! Takes up less space, easy to hide, but in full power!

TEMPERATURE PRESET 78℉(26℃) – Your fish love the temperature of 78℉(26℃)！This temperature preset heater makes fish keeping easier – use the suction cup to fix the heater in the aquarium, plug in, and you are done. The intelligent in-built chip will control the working condition of the heater automatically.

HOW IT WORKS - Plug into the power source, the red light will be on, the heater will start working. When the water temperature reaches 78℉, the red light will be off and the green light will be on, and the heater stopped working and keeps a constant temperature of 78℉. If the temperature is lower than 64℉, red light will flash. If the temperature is higher than 97℉, red and green lights will flash in turn.

[50W Aquarium Heater]- The 50W aquarium heater is suitable for aquariums tank under 10 gallons and the power cord is 4.95 feet long, enough for indoor use. For fish tanks of the same size, the heating speed of high-power heating rods is higher than that of low-power heating rods, and the heating time is shorter.

[Multi-Effect Protection]-1.UL certification +FCC certification to ensure the safety of power supply and plug 2. When the aquarium heater leaves the water surface, the power will be automatically cut off to prevent dry burning. 3. When the target temperature is reached, the continuous heating will be stopped and the constant temperature will be maintained. 4.Heat protection cover does not deformation,will not burn fish and turtles.

[Temperature Range 64℉-91℉] - Suitable water temperature in winter is more suitable for ornamental fish to grow and maintain bright scale color. Betta tank heater adopts nickel wire heating tube, which has uniform heat radiation transfer and fast heating. When the water temperature reaches the set value, the heating stops and the indicator light goes out.

SUPER MINI SIZE – This aquarium heater is SUPER SHORT in length – might be the shortest aquarium heater in the market! It is only a bit more than HALF of the length of the traditional aquarium heaters! The innovative super short length perfectly solves the headache of the fish keepers on the traditional aquarium heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F. 50 Watt for 5 - 10 Gallon tanks.

SUPER ACCURATE 1℉ – Thanks to the intelligent inverter technology, with the in-built chips the thermostat keeps the fish heater at a constant temperature at an accuracy of 1℉, much more accurate than the traditional knob-controlled fish heaters and you save your electricity expenses by 50%!

DIGITAL DISPLAY WITH DOUBLE TEMP. READINGS – This fish tank heater comes with an external thermostat with digital display that shows 2 readings – the current temperature and the set temperature – very easy to switch by pressing the SET button and you save an extra thermometer for current temperature measuring.

【Super Mini Size, 25Watt for 1-5 Gallons】 YukiHalu 25W aquarium heater is designed for 1-5 gallons mini fish tank. Compact design, take less space in the fish tank, easy to hide in the tank. Temperature can be accurately adjusted from 64 to 93°F. This heater suitable for both saltwater and freshwater. The rated voltage is 100-130V.

【Automatic Constant Temperature with 1℉Accuracy】Thanks to advanced Intelligent Frequency Conversion Technology, the water temperature can be kept constant with an accuracy of 1℉. The heater's working frequency will be changed according to temperature variation, and the heating is automatically stopped when the set temperature is reached. Compare to traditional heater, this new technology will cut down 49% electricity bill for you.

【Overheating Protection, Out of Water Protection】The power will be cut off and stop heating automatically if the heater out of water or overheating. Protect your fish. Never cook your fish. 30days full refund, 12-months warranty.