I am feeding just about everything. I have a yellow cup, fungia, acro, montipora, pavona, tubestrea, several types of trachy brain, maze brain, hydronaphora, zoo's, 6 different types of shrooms, ricordia, cabbage leather (almost gone finally), green spaghetti leather, a couple colors of lobo brain, yellow polyps, a green/purple rock anenome,and a clam, and a partridge in a pear tree. The phyto is for softies and clam, the zoo is for LPS/SPS, but I think the softies eat it as well. With the mix of corals I have nothing goes uneaten.
I will do just the GLN at first, maybe for like 60 days. Pause for 30 days, and then maybe try the L-arginine for 60 days. I feed pretty sparsely 6 days a week as far as solid food for the fish, and then give a good heavy feeding on Sunday to make sure the stuff at the bottom of the foodchain are getting something. Monday-Friday feeding basically nothing makes it half way down the water column.