I just got a blue tang yellow belly and a flame back angle. They looked really good in the tanks at the store. I got them home and now a week later I see white spots on the blue tang and possibly some on the angle. I have them in a 105 gallon system that is a mixed reef. I have other fish in the tank with them. I have a fox face, 2 clown fish, bristle tooth tang, scooter Blenny, engineer goby, mandarin goby, and a starry Blenny. What should I do? Is it ich or something else?