lighting is rated in Watts/gallon, and 3w/gal
is the bare minimum for softies. Clams, anenomes, and hard corals are gonna need closer to the 5 w/gal
and up range, I believe.
is not rated Watts/gallon, but on depth. I believe for <18" go with 175 watt. For between 18" & 24", go with 250 watts. >24" go with 400. The key is that you need 1 MH
fixture per 2 feet. 4'x2'x2' tank = 2x250MH. if you go over 4', I would reccommend using a third MH
set up. The actinics don't need to be watt/gallon calculated. Most people just use 2 55w or 96w PCs or VHO
's in conjunction with the MH
. For anenome's, I would definately recommend actinics with the MHs. HTH