Ok, I'm working on turning my original 55 gal. FOWLR tank into a reef. All I have in the tank is 55 lbs live rock, 40 lbs crushed coral, a firefish, and a cleanup crew. I can't possibly afford metal halides, so I'm going with multiple flourescents (3-110 watt bulbs). That is 6 wats per gallon, so I'm planning on low-moderate light inverts. Oh! I also have a 170 gph powerhead, and I'm about to get another one. Is this ok?