Review on Fluval M50 Submersible Heater: Reliable 🔥 and Efficient Heating Solution for Aquatic Environments by Michael Baker

At this point the heater has done its job, but there is a minimum and maximum waterline on the heater. So tell me, is it really fully submersible? I don't know and haven't tried it yet. I had several heaters that I kept in swamps and hid in the tank. However, if not, this is no better than a $7 heater you hang from the back of a tank. Come on Fluval, expect more from you.