Just bought a magnificent fox face and a blue hippo tang. They are in a 50 gallon quarantine tank, which is probably a little small along with a scopas tang and a eibli angel, which have been in there for a couple of months. Ammonia, nitrite and nitrate are zero both the new fish ate well at the LFS and the hippo tank is a voracious eater. The fox face is chasing food, but not eating frozen mysis . no evidence of any external parasites. at the LFS he ate mysis shrimp well . I’ve had the two new fish for two days. Nobody’s picking on them . He’s about 3 inches long looks skinny but no other obvious problems. Also not really eating spectrum pellet food or algae pellets. Any suggestions?