New tank 2 months+ old. Have had no signs of ich at all. Then 2 days ago both my tangs (salfin and scopas) both start rubbing the rock and sand swimming hard into the power head and then today boom scopas is covered. Easier to see on him than the salfin. I have some soft corals and a lot invested in copepods that I have dosed since week one. Tank is a 180 with a 40 gal sump. I have already gone through the uglies. Any and all advise would be greatly appreciated. I have a QT tank but afraid to stress them out more trying to catch them. Thanks in advance!