i pic up spare food from the rocks i dont over feed so theres hardly any at all, i may get a few snails but need to research more first, to many ppl hae corals bitten or fish killed by snails and crabs etc so im not to bother.. plus i hate them they make the tank look ugly lol. i have a linckia blue starfish he is always on the glass though hardly ever goes onto the rocks
oh and tank is 3ft long, 2 ft high and about 1 1/2 ft wide