Yes, all inverts with a hard shell or exoskeleton should go into the coral QT. Shrimp or crabs that molt and don't have a shell that they live in can go into the display after a molt. It would be best to feed these inverts occasionally since they may starve themselves out. I sometimes use a bit of nori tied to a frag plug.... they all flock to it and feast lol. I do feed my QT corals occasionally as well along with dosing amino acids and vitamins twice a week. I dont' do water changes on it as often as I probably should, but the corals seem to do well anyway.