![Amazon.com: Betta Fish Tank Heater, 25W Mini Aquarium Heaters Free 2 Artificial Plants 1 Stick-on Thermometer Strip 2 Suction Cups, Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank : Pet Supplies Amazon.com: Betta Fish Tank Heater, 25W Mini Aquarium Heaters Free 2 Artificial Plants 1 Stick-on Thermometer Strip 2 Suction Cups, Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank : Pet Supplies](https://m.media-amazon.com/images/I/51VdEp3BDYL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Betta Fish Tank Heater, 25W Mini Aquarium Heaters Free 2 Artificial Plants 1 Stick-on Thermometer Strip 2 Suction Cups, Water Warmer Temperature Controller Smart Thermostat for 3-5 Gallon Tank : Pet Supplies
![Amazon.com: AquaMiracle Adjustable 10W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 1-2 Gallon Tanks : Pet Supplies Amazon.com: AquaMiracle Adjustable 10W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 1-2 Gallon Tanks : Pet Supplies](https://m.media-amazon.com/images/I/61gm+rxBmwL.jpg)
Amazon.com: AquaMiracle Adjustable 10W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 1-2 Gallon Tanks : Pet Supplies
![Amazon.com: PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) : Pet Supplies Amazon.com: PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) : Pet Supplies](https://m.media-amazon.com/images/I/61PrJ9gAPSS._AC_UF1000,1000_QL80_.jpg)
Amazon.com: PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) : Pet Supplies
![Amazon.com: DaToo 10 Watt Small Aquarium Heater Mini Betta Flat Fish Tank Heater for 1 Gallon 1.5 Gallon : Pet Supplies Amazon.com: DaToo 10 Watt Small Aquarium Heater Mini Betta Flat Fish Tank Heater for 1 Gallon 1.5 Gallon : Pet Supplies](https://m.media-amazon.com/images/I/61-IRpick+L.jpg)
Amazon.com: DaToo 10 Watt Small Aquarium Heater Mini Betta Flat Fish Tank Heater for 1 Gallon 1.5 Gallon : Pet Supplies
![Amazon.com: AquaMiracle Adjustable 10W Betta Heater Small Aquarium Heater Submersible Fish Tank Heater 5V/2A USB Powered Super Mini Aquarium Heater with Digital Display Thermostat, for up to 1 Gallon Tanks : Pet Amazon.com: AquaMiracle Adjustable 10W Betta Heater Small Aquarium Heater Submersible Fish Tank Heater 5V/2A USB Powered Super Mini Aquarium Heater with Digital Display Thermostat, for up to 1 Gallon Tanks : Pet](https://m.media-amazon.com/images/I/71KA8vglF6L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: AquaMiracle Adjustable 10W Betta Heater Small Aquarium Heater Submersible Fish Tank Heater 5V/2A USB Powered Super Mini Aquarium Heater with Digital Display Thermostat, for up to 1 Gallon Tanks : Pet
![PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) - Walmart.com PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) - Walmart.com](https://i5.walmartimages.com/asr/12e03e27-a965-439d-a6f8-780fa3233021.cc9a4def29c95fb6311ffc1d5838bd66.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
PULACO 25W Small Aquarium Betta Heater with Free Thermometer Strip, Under 6 Gallon Fish Tanks (Preset Temperature 78℉) - Walmart.com
![Amazon.com : SILICAR Mini Aquarium Heater, 20W Fish Tank Heater with Built-in Thermometer, LED Display, External Temperature Controller, Submersible Turtle Tank Heater for 0.5-1 Gallon : Pet Supplies Amazon.com : SILICAR Mini Aquarium Heater, 20W Fish Tank Heater with Built-in Thermometer, LED Display, External Temperature Controller, Submersible Turtle Tank Heater for 0.5-1 Gallon : Pet Supplies](https://m.media-amazon.com/images/I/71cnRmhTpUL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : SILICAR Mini Aquarium Heater, 20W Fish Tank Heater with Built-in Thermometer, LED Display, External Temperature Controller, Submersible Turtle Tank Heater for 0.5-1 Gallon : Pet Supplies
![Amazon.com: Kulife 5V/2A USB Powered 10W Super Mini Fish Tank Heater Adjustable Submersible Aquarium Heater Betta Heater Turtle Heater with LED Display Thermostat - for up to 1 Gallon Tanks : Pet Amazon.com: Kulife 5V/2A USB Powered 10W Super Mini Fish Tank Heater Adjustable Submersible Aquarium Heater Betta Heater Turtle Heater with LED Display Thermostat - for up to 1 Gallon Tanks : Pet](https://m.media-amazon.com/images/I/714ux013iAL.jpg)
Amazon.com: Kulife 5V/2A USB Powered 10W Super Mini Fish Tank Heater Adjustable Submersible Aquarium Heater Betta Heater Turtle Heater with LED Display Thermostat - for up to 1 Gallon Tanks : Pet
![Amazon.com: AquaMiracle 50W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater, Easy Operation with Preset Temperature 78℉(26℃), for Tanks up to 10 Gallon : Pet Supplies Amazon.com: AquaMiracle 50W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater, Easy Operation with Preset Temperature 78℉(26℃), for Tanks up to 10 Gallon : Pet Supplies](https://m.media-amazon.com/images/S/aplus-media-library-service-media/471d1e89-8f61-474a-81dd-14a273fe98ef.__CR0,0,970,600_PT0_SX970_V1___.jpg)
Amazon.com: AquaMiracle 50W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater, Easy Operation with Preset Temperature 78℉(26℃), for Tanks up to 10 Gallon : Pet Supplies
![Amazon.com: Hydor Betta Bowl Slim Fish Tank Heater, 7.5-watt, measures 3.5 inches round, black; For tanks 2-5 gallons : Pet Supplies Amazon.com: Hydor Betta Bowl Slim Fish Tank Heater, 7.5-watt, measures 3.5 inches round, black; For tanks 2-5 gallons : Pet Supplies](https://m.media-amazon.com/images/I/819JO3CzYOL.jpg)
Amazon.com: Hydor Betta Bowl Slim Fish Tank Heater, 7.5-watt, measures 3.5 inches round, black; For tanks 2-5 gallons : Pet Supplies
![Tawatiler Aquarium Heater,25W/50W Fish Tank Heater for 1-12 Gallon Fish Tanks,Small Automatic Thermostatic Betta/Turtle Tank Heater with Powerful Big Sucker(Preset Temperature 78℉) - Walmart.com Tawatiler Aquarium Heater,25W/50W Fish Tank Heater for 1-12 Gallon Fish Tanks,Small Automatic Thermostatic Betta/Turtle Tank Heater with Powerful Big Sucker(Preset Temperature 78℉) - Walmart.com](https://i5.walmartimages.com/asr/110bd7d8-79df-4194-aa81-31ce3c5c3a99.9ce08bfd6c5963350eb685b88acb3eee.jpeg)