
The 800w heater easily handles my 125 gallon aquarium. I ordered a replacement about 6 months later as the original was not temperature controllable and the new one was sent free of charge. The new one is fine. Note: This heater, like everything I've had, measures the temperature of the water next to the heater. Therefore you have to set the temperature a few degrees warmer than you actually want the aquarium to be. You must have a way of measuring the temperature of the water in the part of the tank that is not near the heater.

Faucet water heater with display
13 Review

Convector Electrolux ECH/T-2000 M, white
21 Review

Tetra HT Submersible Aquarium Heater: Efficiently Regulate Temperature with Electronic Thermostat
9 Review

Hardy Leaf Black Forest Asian Java Fern Potted Live Water Aquatic Aquarium Plants For Freshwater Fish Tank By Greenpro Microsorum Pteropus
39 Review

Jasonwell Magnetic Aquarium Fish Tank Glass Algae Cleaner - Floating Brush (L Size)
37 Review

Mini pump Xiaomi Mijia Electric Pump 1S, plastic, black
55 Review

π§² Efficient Magnetic Fish Tank Cleaner: KEDSUM Floating Clean Brush with Handle Design
34 Review

Steam cleaner Deerma Deerma DEM-ZQ610 EU, white/red
68 Review