![Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 7445035654614 | eBay Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 7445035654614 | eBay](https://i.ebayimg.com/images/g/aj4AAOSwHCJjvKgJ/s-l400.png)
Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781 7445035654614 | eBay
![$3/mo - Finance Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. | Buy Now, Pay Later $3/mo - Finance Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. | Buy Now, Pay Later](https://m.media-amazon.com/images/I/71JRKsqOfHL._AC_US1400_.jpg)
$3/mo - Finance Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. | Buy Now, Pay Later
![Just got a fluval M50 heater, has these small scratches under the glass on the mirror finish, is this something to be worried about or normal for the M50? No cracks or Just got a fluval M50 heater, has these small scratches under the glass on the mirror finish, is this something to be worried about or normal for the M50? No cracks or](https://preview.redd.it/just-got-a-fluval-m50-heater-has-these-small-scratches-v0-xeiskg5x2oe81.jpg?width=640&crop=smart&auto=webp&s=80c8cb97a35eb801bc35f73294ccd21e0fefde80)
Just got a fluval M50 heater, has these small scratches under the glass on the mirror finish, is this something to be worried about or normal for the M50? No cracks or
![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
![FS] - San Diego 92109 - $70 - 10 gal rimless tank set up w/ lid, mat, Aquaclear 20, Fluval M50, Nicrew ClassicLED 18-24" (broken down, pics/info in comments) : r/AquaSwap FS] - San Diego 92109 - $70 - 10 gal rimless tank set up w/ lid, mat, Aquaclear 20, Fluval M50, Nicrew ClassicLED 18-24" (broken down, pics/info in comments) : r/AquaSwap](https://preview.redd.it/4j5w7tiz7qf61.jpg?auto=webp&s=2dabed42ca55fe836b1dcb40c9bf68c69b7eb166)