I wanted to know what type of corals are ok to have in a tank with NO lighting I have 4-40watt NO Tubes right now but will be upgrading in the future to 2 "Custom sealife 24 smartlite RetroFit kit" the current inhabbiants of my tank are a medium sized yellow tank 2 percula clowns 1 Blue legged herrmitt Crab and three yellow tailed blue damsels in a 55 gal with a crushed coral bed with about 5 lbs of live rock and about 10 lbs base rock starting to turn.