Is there any rule of the thumb on how many watts per gallon or something?
0verfl0w Member Oct 20, 2005 #1 Is there any rule of the thumb on how many watts per gallon or something?
ophiura Active Member Oct 20, 2005 #2 Yup, it is roughly 3-5 Watts per gallon. Some people would prefer to use two heaters (eg in large tanks) as one can "back up" the other if it fails to turn on.
Yup, it is roughly 3-5 Watts per gallon. Some people would prefer to use two heaters (eg in large tanks) as one can "back up" the other if it fails to turn on.
