okay well i am feeding my fish the frozen cube of brine shrimp. the lady at the LFS said to feed them half the cube. i have a firefish, yellow watchmen goby, 2 clowns, anemone crab, emerald crab, 4 hermit crabs, 4 turbo snails and a nassaria snail. am i feeding too much? how much should i be feeding them. im just feeding them like the LFS said too