I have a 130 gallon water box with 2 davincii clowns, a melenarus wrasse, a coral beauty and a purple tang. also a TON of corals. this is the first time in years of owning tanks that I've gotten ich. I know the purple tang has ich but can't quite tell about the others. Don't have a quarantine. worried about the others getting infected and scared to dose copper for fear of hurting and killing the very valuable corals. need advise ASAP so I can take action. the levels are all very good atm just tested.