I can't figure out if I am over feeding or under feeding my tank. It's a 30 gallon tank and I have the following livestock: 2 percula clowns, 1 lemonpeel angel, 1 fire shrimp, 1 peppermint shrimp, 5 hermit crabs, and about 10 snails. I have been giving a pinch of Tetra MircoCrabs Cyclop-eeze...