1st thing id do is THROW away the Flake food period...use frozen food, strain it with R/O water then feed fish, cut back on feeding, the fish will live feeding them once a day. That away they eat everything u put in there once, and not pick and choose, 2nd buy 2 Two little fishys reactors and run GFO(ROWAPHAUS) in one and CARBON in the 2nd. Change one a month. Rowa is exspensive but its the best on the market. Bulk reef supply sells one comparable also. Carbon, look for one with no PHOSPHATES in it, i use the Marineland, why I ask a friend and thats what the recomended. I wash it with RO water also. NUTRIENT export is the main issue. CUC(clean up crew) mmmmmm.... in my 120g i put 200 redlegs(cause they typicaly dont kill eachother for there shell, they eat algae) and 150 snails. in a 2 week period u couldnt grow algae anywhere in my tank. but now i hv to feed them to keep them alive. I just use a sinking food at night after the light go out.(so the fish dont eat it). Maybe with all our comments ur issue will clear up.