I was thinking of going with an ah supply kit, i have a standard aquarium hood. They make a kit that will fit right in. or should i build a whole new hood? Its a 20 gal tank and my plans are to add some corals. Is 36w good enough or should i go to 55w. And do the combo PC bulbs work as good as the solid ones? I wanna try to stay around 50 bucks if possible. Any Ideas?