I've read that you need at least 10w per gallon, so you'd need the 50w for a 5 gallon. I could be wrong though, so don't quote me on that!
That is false. It is 5 watts per gallon.I've read that you need at least 10w per gallon, so you'd need the 50w for a 5 gallon. I could be wrong though, so don't quote me on that!