![Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else](https://m.media-amazon.com/images/I/71JRKsqOfHL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else
![Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else](https://m.media-amazon.com/images/I/81lBwwrivML.jpg)
Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else
![Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else](https://m.media-amazon.com/images/I/71JRKsqOfHL.jpg)
Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else
![Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else](https://m.media-amazon.com/images/I/81CHh1+rx2L.jpg)
Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else
![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 scratches on the outer glass : r/Aquariums 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 scratches on the outer glass : r/Aquariums](https://i.redd.it/just-got-a-fluval-m50-heater-has-these-small-scratches-v0-c4emyjbx2oe81.jpg?width=1824&format=pjpg&auto=webp&s=1ceef3c6c303db84e14a8e1ce8826d54dd8b8ced)
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 scratches on the outer glass : r/Aquariums
![Amazon.com: Customer reviews: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. Amazon.com: Customer reviews: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal.](https://m.media-amazon.com/images/I/71PPTsslRwL._CR0,248,1187,1187_UX256.jpg)
Amazon.com: Customer reviews: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal.
![Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else](https://m.media-amazon.com/images/I/813vqgEvbdL._AC_UF350,350_QL80_.jpg)
Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else
![Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else](https://m.media-amazon.com/images/I/810NGYdbZpL.jpg)
Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else
![Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else Amazon.com: Fluval M50 Ultra-Slim Submersible Aquarium Heater – 50W Underwater Heater for Aquariums up to 15 Gal. : Everything Else](https://m.media-amazon.com/images/I/91-t+FwADQL.jpg)