I havn't introduced any new fish, only corals. My understanding was that coral could not introduce ICK. Is this Correct? I have 1 tank raised true perc (appears infected) approx 4 years old, 1 Bangai Cardinal, 4 yers old, 4 blue chromis I introduced in November. 1 Fire shrimp. Everything else appears to be very healthy. Nothing harasses the clown, it hangs out in the GBTA 24/7 except for feeding time. Should I remove him to a QT now or give it a day?