Still planning the big basement tank, and I'm choosing (right now) between a 125g long (72x18x22) and a 180g (72x24x24). I'm going with AH Supply lighting and it occurred to me that since the tanks are the same length, do I need more light on a 180g? I guess I'm getting hung up on the old watts per gallon question again.
For the 125g, I was looking at the 4x96w kit, which should be a nice even 3wpg. With the 180g, I was going to add a 3rd 2x96 ballast, but where would I put it? It's covering the same length of tank after all and the tanks are only 2" difference in depth, so do I suspend the third one in the middle offset front/back with the other 2 fixtures, or does the watt per gallon rule fall down in this sort of scenario?
For the 125g, I was looking at the 4x96w kit, which should be a nice even 3wpg. With the 180g, I was going to add a 3rd 2x96 ballast, but where would I put it? It's covering the same length of tank after all and the tanks are only 2" difference in depth, so do I suspend the third one in the middle offset front/back with the other 2 fixtures, or does the watt per gallon rule fall down in this sort of scenario?
