I'd like to further corroborate the fact that the size of the pellets is almost certainly the problem. I use those pellets to feed my crabs because they get all the way to the bottom without my chromis being able to eat them. They try to, but they just spit them back out. Unfortunately I just got a fish that's big enough to eat them, so now my crabs are having to do without until I come up with a better plan.
92-gallon corner tank, 100lbs of LR
, 140lbs of sand, 250watt 10,000K MH
, 110watts of actinic PCs, Mag 7 return, custom refugium, AquaC EV180 w/ Mag 5
Female lyretail anthias, eyelash blenny, tomato clown, saddleback clown, firefish goby, 2 sand-sifting stars