![Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies](https://m.media-amazon.com/images/I/810NGYdbZpL.jpg)
Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies
![Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies](https://m.media-amazon.com/images/I/71JRKsqOfHL.jpg)
Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies
![Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies](https://m.media-amazon.com/images/I/71JRKsqOfHL._AC_UF1000,1000_QL80_.jpg)
Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies
![Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : Amazon.ca: Pet Supplies](https://m.media-amazon.com/images/I/71oUhu5PtIL.jpg)
Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 : 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)