Review on BOEESPAT Submersible Aquarium Heater 100W/200W/300W/500W with Anti Scald Protector, Thermometer Included - Ideal for Marine Saltwater and Freshwater Fish Tanks by Tracey Brown

This is the second replacement for the first one which overheated and melted the plastic shell around it. So I sent it back, got a free replacement thanks to Revain who replaced it for free and wow this one doesn't keep my little 25 gallons hot at 84 degrees for my discus who likes it at 82-86 degrees. Bought it for the power. It's supposed to be able to heat a large tank (0 or 55 gallons) to 84 or whatever temperature you set. I graduated 88 and am getting the tank up to 76.