![HITOP Adjustable Aquarium Heater with Protective Cover, 50W 100W 120W Fish Tank Heater for 10/20/30 Gallon Fish Tank or Turtle Tank : Amazon.ca: Pet Supplies HITOP Adjustable Aquarium Heater with Protective Cover, 50W 100W 120W Fish Tank Heater for 10/20/30 Gallon Fish Tank or Turtle Tank : Amazon.ca: Pet Supplies](https://m.media-amazon.com/images/I/71WE-Ry7cLL.jpg)
HITOP Adjustable Aquarium Heater with Protective Cover, 50W 100W 120W Fish Tank Heater for 10/20/30 Gallon Fish Tank or Turtle Tank : Amazon.ca: Pet Supplies
![Amazon.com: AQQA Aquarium Heater 100W Submersible Fish Tank Heater 10-30 Gallon Aquarium Betta Heater Small Aquarium with Suction Cups Thermostat Heater for Freshwater & Saltwater(100W) : Pet Supplies Amazon.com: AQQA Aquarium Heater 100W Submersible Fish Tank Heater 10-30 Gallon Aquarium Betta Heater Small Aquarium with Suction Cups Thermostat Heater for Freshwater & Saltwater(100W) : Pet Supplies](https://m.media-amazon.com/images/I/71iAOATfWIL.jpg)
Amazon.com: AQQA Aquarium Heater 100W Submersible Fish Tank Heater 10-30 Gallon Aquarium Betta Heater Small Aquarium with Suction Cups Thermostat Heater for Freshwater & Saltwater(100W) : Pet Supplies
![INKBIRD Titanium Aquarium Heater for Freshwater or Saltwater Tanks 300W Submersible Fish Tank Heater with Smart IC Chip andWaterproof LCD Screen Adjustable Heating Temperature 68℉-94℉(20°C-34°C) : Amazon.ca: Pet Supplies INKBIRD Titanium Aquarium Heater for Freshwater or Saltwater Tanks 300W Submersible Fish Tank Heater with Smart IC Chip andWaterproof LCD Screen Adjustable Heating Temperature 68℉-94℉(20°C-34°C) : Amazon.ca: Pet Supplies](https://m.media-amazon.com/images/I/61NpYD54F2L.jpg)
INKBIRD Titanium Aquarium Heater for Freshwater or Saltwater Tanks 300W Submersible Fish Tank Heater with Smart IC Chip andWaterproof LCD Screen Adjustable Heating Temperature 68℉-94℉(20°C-34°C) : Amazon.ca: Pet Supplies
![I bought these fluval heater and it's made for up to 30 gallon tanks , but it doesn't seem to be heating my 20 at all, i have it set to 82 I bought these fluval heater and it's made for up to 30 gallon tanks , but it doesn't seem to be heating my 20 at all, i have it set to 82](https://i.redd.it/5hzrbl79lb9a1.jpg)