I just purchased a Naso Tang and a Royal Gramma for my tank, 100 Gallon Reef with 1 Clown, 1 Psudo Chromis, 1 Lyrtail Chromis. Both new fish are very shy, the Naso will come out when no one is in sight, and the Gramma will not come out at all. I am affraid that they will not eat and die. They...