I have a 3Gallon/13litre (tall) tank and wanting to put 4 guppies in it. Is it okay to use a 50W heater in a 3 gallon tank?
It has an auto thermostat control on it. Just concerned it might be too powerful for a tank that is smaller than the suggested tank size for the heater. The heater says it's okay to use with a tank that is 25 to 50 litres.
Thanks,
Julz