![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: VIVOSUN Submersible Aquarium Heater with Thermometer Combination, 50W Titanium Fish Tank Heaters with Intelligent LED Temperature Display and External Temperature Controller : Pet Supplies Amazon.com: VIVOSUN Submersible Aquarium Heater with Thermometer Combination, 50W Titanium Fish Tank Heaters with Intelligent LED Temperature Display and External Temperature Controller : Pet Supplies](https://m.media-amazon.com/images/I/61R6XjGJQjL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: VIVOSUN Submersible Aquarium Heater with Thermometer Combination, 50W Titanium Fish Tank Heaters with Intelligent LED Temperature Display and External Temperature Controller : Pet Supplies
![Amazon.com: Kinbo Aquarium Heater 300 Watt Submersible Fish Tank Heater Adjustable Temperature with Diving Thermometer and Protective Case Suction Cup : Pet Supplies Amazon.com: Kinbo Aquarium Heater 300 Watt Submersible Fish Tank Heater Adjustable Temperature with Diving Thermometer and Protective Case Suction Cup : Pet Supplies](https://m.media-amazon.com/images/I/51RaGZrmz8L.jpg)
Amazon.com: Kinbo Aquarium Heater 300 Watt Submersible Fish Tank Heater Adjustable Temperature with Diving Thermometer and Protective Case Suction Cup : Pet Supplies
![Amazon.com: AQQA Aquarium Heater 300W for 80-95 Gallon Fish Tank Heater Aquarium Submersible Heater Betta Fish Heater Aquarium Thermostat Heater for Freshwater Saltwater Fish Tanks (300W for 80-95 Gal) : Pet Supplies Amazon.com: AQQA Aquarium Heater 300W for 80-95 Gallon Fish Tank Heater Aquarium Submersible Heater Betta Fish Heater Aquarium Thermostat Heater for Freshwater Saltwater Fish Tanks (300W for 80-95 Gal) : Pet Supplies](https://m.media-amazon.com/images/S/aplus-media-library-service-media/2182f7b8-6053-478a-8cb0-b4eae5a98c01.__CR0,0,362,453_PT0_SX362_V1___.png)
Amazon.com: AQQA Aquarium Heater 300W for 80-95 Gallon Fish Tank Heater Aquarium Submersible Heater Betta Fish Heater Aquarium Thermostat Heater for Freshwater Saltwater Fish Tanks (300W for 80-95 Gal) : Pet Supplies
![Amazon.com: YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts) : Pet Supplies Amazon.com: YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts) : Pet Supplies](https://m.media-amazon.com/images/I/618+BqHf5yL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: YukiHalu Small Submersible Aquarium Heater, Adjustable Mini Fish Tank Heater 25W 50W 100W 200W 300W with External Temperature Controller, LED Display, Used for 5/10/20/40/60 Gallons (25 Watts) : 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: HITOP 25W 50W 100W 200W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cups (100W-grey) : Pet Supplies Amazon.com: HITOP 25W 50W 100W 200W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cups (100W-grey) : Pet Supplies](https://m.media-amazon.com/images/I/615D4JHwbNS._AC_UF1000,1000_QL80_.jpg)
Amazon.com: HITOP 25W 50W 100W 200W 300W Adjustable Aquarium Heater, Submersible Fish Tank Heater Thermostat with Suction Cups (100W-grey) : Pet Supplies
![Amazon.com: DaToo Submersible 50W Aquarium Heater Adjustable Fish Tank Heater 50 Watt : Pet Supplies Amazon.com: DaToo Submersible 50W Aquarium Heater Adjustable Fish Tank Heater 50 Watt : Pet Supplies](https://m.media-amazon.com/images/I/41Ae70VWl6L.jpg)
Amazon.com: DaToo Submersible 50W Aquarium Heater Adjustable Fish Tank Heater 50 Watt : Pet Supplies
![Amazon.com: BOEESPAT Aquarium Heater 100W Fish Tank Heater with Anti Scald Protector and Aquarium Thermometer, Fully Submersible Fish Heater for Marine Saltwater and Freshwater (100) : Pet Supplies Amazon.com: BOEESPAT Aquarium Heater 100W Fish Tank Heater with Anti Scald Protector and Aquarium Thermometer, Fully Submersible Fish Heater for Marine Saltwater and Freshwater (100) : Pet Supplies](https://m.media-amazon.com/images/I/71ZX8EBkq4L._AC_UF1000,1000_QL80_.jpg)
Amazon.com: BOEESPAT Aquarium Heater 100W Fish Tank Heater with Anti Scald Protector and Aquarium Thermometer, Fully Submersible Fish Heater for Marine Saltwater and Freshwater (100) : Pet Supplies
![Amazon.com: HITOP PTC Adjustable Aquarium Heater, Sturdy Fish Tank Heater with Protective Cover, 100W/200W/300W/400W Heater for Fresh/Saltwater Fish/Turtle Tank up to 120 Gallon : Pet Supplies Amazon.com: HITOP PTC Adjustable Aquarium Heater, Sturdy Fish Tank Heater with Protective Cover, 100W/200W/300W/400W Heater for Fresh/Saltwater Fish/Turtle Tank up to 120 Gallon : Pet Supplies](https://m.media-amazon.com/images/I/71KCeVE0IBL.jpg)
Amazon.com: HITOP PTC Adjustable Aquarium Heater, Sturdy Fish Tank Heater with Protective Cover, 100W/200W/300W/400W Heater for Fresh/Saltwater Fish/Turtle Tank up to 120 Gallon : Pet Supplies
![Amazon.com: FREESEA 100 Watt Aquarium Fish Tank Heater with Aquarium Submersible Thermometer : Pet Supplies Amazon.com: FREESEA 100 Watt Aquarium Fish Tank Heater with Aquarium Submersible Thermometer : Pet Supplies](https://m.media-amazon.com/images/I/71UpSTTTLKL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: FREESEA 100 Watt Aquarium Fish Tank Heater with Aquarium Submersible Thermometer : Pet Supplies
![Amazon.com: FEDOUR Adjustable Aquarium Heater with Protective Cover, 30W 50W 60W 120W Submersible Heater Thermostat for 5-40Gallon Fish and Turtle Tank (50W for 5-15Gallon) : Pet Supplies Amazon.com: FEDOUR Adjustable Aquarium Heater with Protective Cover, 30W 50W 60W 120W Submersible Heater Thermostat for 5-40Gallon Fish and Turtle Tank (50W for 5-15Gallon) : Pet Supplies](https://m.media-amazon.com/images/I/61Jqhn4rTsS.jpg)
Amazon.com: FEDOUR Adjustable Aquarium Heater with Protective Cover, 30W 50W 60W 120W Submersible Heater Thermostat for 5-40Gallon Fish and Turtle Tank (50W for 5-15Gallon) : Pet Supplies
![Amazon.com: hygger 500W Aquarium Heater, Submersible Fish Tank Water Heater with External Color LED Digital Temperature Controller, Fast Heating for 60~120 Gallon : Everything Else Amazon.com: hygger 500W Aquarium Heater, Submersible Fish Tank Water Heater with External Color LED Digital Temperature Controller, Fast Heating for 60~120 Gallon : Everything Else](https://m.media-amazon.com/images/I/71NYC1gmfWL.jpg)
Amazon.com: hygger 500W Aquarium Heater, Submersible Fish Tank Water Heater with External Color LED Digital Temperature Controller, Fast Heating for 60~120 Gallon : Everything Else
![Simple Deluxe 100W Aquarium Heater Submersible Fish Tank Heater with LED Temperature Display & Controller - Walmart.com Simple Deluxe 100W Aquarium Heater Submersible Fish Tank Heater with LED Temperature Display & Controller - Walmart.com](https://i5.walmartimages.com/asr/d81753ba-a386-4611-9310-de2e17c6d52f.8be2c9e554a62e5b5c8e564b160e91dd.jpeg)
Simple Deluxe 100W Aquarium Heater Submersible Fish Tank Heater with LED Temperature Display & Controller - Walmart.com
![Amazon.com: AQQA Aquarium Heater 200W for 45-80 Gallon Submersible Fish Tank Heater for Aquarium Betta Fish Heater Aquarium Thermostat Heater Freshwater and Saltwater (200W for 45-80 Gal) : Pet Supplies Amazon.com: AQQA Aquarium Heater 200W for 45-80 Gallon Submersible Fish Tank Heater for Aquarium Betta Fish Heater Aquarium Thermostat Heater Freshwater and Saltwater (200W for 45-80 Gal) : Pet Supplies](https://m.media-amazon.com/images/I/71yWByT9G8S.jpg)