![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 : YukiHalu Submersible Aquarium Heater, 10W/20W/30W Adjustable Mini Fish Tank Heater, External Temperature Controller, LED Temperature Display, Used for 0.5-1/2/3 Gallons (10 Watts (1 Gallon)) : Pet Supplies Amazon.com : YukiHalu Submersible Aquarium Heater, 10W/20W/30W Adjustable Mini Fish Tank Heater, External Temperature Controller, LED Temperature Display, Used for 0.5-1/2/3 Gallons (10 Watts (1 Gallon)) : Pet Supplies](https://m.media-amazon.com/images/I/71JOCgtblqL._AC_UF1000,1000_QL80_.jpg)
Amazon.com : YukiHalu Submersible Aquarium Heater, 10W/20W/30W Adjustable Mini Fish Tank Heater, External Temperature Controller, LED Temperature Display, Used for 0.5-1/2/3 Gallons (10 Watts (1 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
![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.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 : 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/71KeDATSrpL._AC_UF350,350_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
![Eemax Mini-Tank 1-Gallon Short 5-year Limited Warranty 1400-Watt 1 Element Point Of Use Electric Water Heater in the Water Heaters department at Lowes.com Eemax Mini-Tank 1-Gallon Short 5-year Limited Warranty 1400-Watt 1 Element Point Of Use Electric Water Heater in the Water Heaters department at Lowes.com](https://mobileimages.lowes.com/productimages/97f20117-27ef-4adb-88b4-87375d900411/48838414.jpg)
Eemax Mini-Tank 1-Gallon Short 5-year Limited Warranty 1400-Watt 1 Element Point Of Use Electric Water Heater in the Water Heaters department at Lowes.com
![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/71BXr24kTqL._AC_UF350,350_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
![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._AC_UF1000,1000_QL80_.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: YOFOTHS Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display External Temperature Controller (USB-10W) : Pet Supplies Amazon.com: YOFOTHS Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display External Temperature Controller (USB-10W) : Pet Supplies](https://m.media-amazon.com/images/I/61Xkmnll0FL._AC_UF350,350_QL80_.jpg)
Amazon.com: YOFOTHS Adjustable Mini Aquarium Heater 0.5/1/2/3 Gallon Submersible Small Fish Tank Heater 10W/20W/30W Digital Display External Temperature Controller (USB-10W) : Pet Supplies
![Amazon.com: HITOP Mini Submersible Aquarium Heater - 25W 50W 100W 200W 300W Small Heater for Fish Tank 1-70 Gallon with Controller (25W) : Pet Supplies Amazon.com: HITOP Mini Submersible Aquarium Heater - 25W 50W 100W 200W 300W Small Heater for Fish Tank 1-70 Gallon with Controller (25W) : Pet Supplies](https://m.media-amazon.com/images/I/71TS7PaKn1L.jpg)
Amazon.com: HITOP Mini Submersible Aquarium Heater - 25W 50W 100W 200W 300W Small Heater for Fish Tank 1-70 Gallon with Controller (25W) : 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._AC_UF1000,1000_QL80_.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
![Hygger Aquarium Heater, 50W Mini Submersible Fish Tank Heater for 1-6.5 Gallon Fish Tank, LED Temperature Display and External Temperature Controller, Suitable for Betta, Turtle - Walmart.com Hygger Aquarium Heater, 50W Mini Submersible Fish Tank Heater for 1-6.5 Gallon Fish Tank, LED Temperature Display and External Temperature Controller, Suitable for Betta, Turtle - Walmart.com](https://i5.walmartimages.com/asr/1897373d-8fef-4f53-82a2-99e534ca8d6a.c28dfbf2bc7d3425f5810a2abf4b6ca7.jpeg)
Hygger Aquarium Heater, 50W Mini Submersible Fish Tank Heater for 1-6.5 Gallon Fish Tank, LED Temperature Display and External Temperature Controller, Suitable for Betta, Turtle - Walmart.com
![Amazon.com: Abustle pig Mini Aquarium Heater,25W/50W Small Submersible Fish Tank Betta Heater Thermostat with Free Thermometer Sticker, Under 6 Gallon Fish Tanks (25 W) : Pet Supplies Amazon.com: Abustle pig Mini Aquarium Heater,25W/50W Small Submersible Fish Tank Betta Heater Thermostat with Free Thermometer Sticker, Under 6 Gallon Fish Tanks (25 W) : Pet Supplies](https://m.media-amazon.com/images/I/61Wv7BB4B8L.jpg)
Amazon.com: Abustle pig Mini Aquarium Heater,25W/50W Small Submersible Fish Tank Betta Heater Thermostat with Free Thermometer Sticker, Under 6 Gallon Fish Tanks (25 W) : 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 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/71zq+Le5nAL._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: 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/61glwxdnvWL._AC_UF350,350_QL80_.jpg)