ive got something going on with my tank, noticed it on my hippo, then purple tang, now the fins of my saddle puffer and side fins on my naso. is it ich? ive tried to take a couple pics, it just looks like gunk on their fins, not white balls or fuzzy patches. the purple tang im hoping is shedding more or less, and getting over it. its starting to look like its on the sides of the naso too, the hippo has it all over its body. not big white salt chunks like ich that im accustomed to. my regal angel looks like he has a faint white haze to him too, he quit eating this morning too. he acts normal so far. i am treating with copper now, thinking it was ich before but now im wondering if it's a fungus instead. help!! thank you