It behaves like Ich, but the spots protrude. Please excuse my spelling if I spell that wrong, lol
There is also something called ick
Keep them fish free for a couple of months if you don't want to cure your sick fish? Get a tank for your inverts (small one) and then treat your fish??
I could, but then if I treat with copper, they cannot come back, plus I don't have the money...
Hmm... I could rehome my inverts....