Amanda asked:


I’m getting a 5 gallon tank for a betta fish, and I’m looking for a heater. How strong should the heater be? Everything seems like it’s supposed to be used for a much smaller or much larger tank than what I’m getting.

Magnum Opus asked:


Out of all the heaters you plug into a wall power socket, which is the cheapest to operate?

ie, fan heater? oil heater? radiant heater? or something else?

Thanks!