![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._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/91-t+FwADQL.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/81CHh1+rx2L.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/31ZcP-KcdiL._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_PIStarRatingFOURANDHALF%2CBottomLeft%2C360%2C-6_SR600%2C315_ZA3%252C342%2C445%2C290%2C400%2C400%2CAmazonEmberBold%2C12%2C4%2C0%2C0%2C5_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.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
![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)
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
![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)