300W Aquarium Heater good for up to 55 Gallons. Up to 500W for 80 Gallons also available.

Orlushy Aquarium Heater – 300W
I use these heaters in all my tanks. 300W aquarium heater good for up to 55 gallon tank. Up to 500W for 80 Gallons also available. I prefer using multiple smaller heaters as a redundant safety measure. Comes in multiple sizes.
Orlushy Aquarium Heater – 300W