how often do you feed your clams and how much, please give you tank and sump size, and corals in these tanks, thanks! The reason I ask is that I grow my own phyto, and have really gotten good at it. I guess I want to make sure I am not over doing the feeding. I have a 4-5 inch derasa, a 4-5 inch diameter yellow toadstool, a 3-4 inch regular toadstool, a 2-3 kenyan tree, and I believe those are the only corals that would consume phyto, the rest, like some zoo's a montipora, etc do not consume it. I have a 37G main tank with a 15G refugium. Lighting is a 250 watt 14K hamilton halide with 2X64 03 actinics, and a 64 watt 10,000K powercompact for the refugium lighting. thanks again!