So I’m dealing with something iv never seen before and I prolly made a mistake of adding this fish since everything was fine until I did and I have no access to quarantining but I added a heniochus butterfly to my system a couple weeks ago and he was fine for the first week and then one day he was covered in white spots usually more than what ich puts out but he was still eating and all my other fish were fine then the next day its like he lost vision a little bit but was still eating which I had to hand feed basically put it right in front of his mouth. Fast forward 2 days later he is laying on his side on the sand bed breathing heavy then I watched him take his last breath. Couple days later my mimic tang started getting like milky white skin and couple white dots and hiding all day and night and he soon did the same thing which he laid on his side and was breathing heavy. The next day my powder blue was covered but still eating and he soon went a couple days later also. Still alive in the tank are a blue hippo, flame angel, wrasse, 2 clowns. One clown looks to have kinda like milky white skin and every fish is hiding a lot but the blue hippo looks fine and is eating, wrasse looks fine and is eating, flame angel has very little white spots on him and one of his eyes looks like it’s swollen but he is still eating. I have been dosing rally pro and today is the third day I have dosed it. Only picture I have is of the mimic the day before he went