KurtG wrote:
My tang has been itching itself for weeks/months, and often allows the
4-stripe damsels to "chew" on him. However, he's a nut case anyway, so
I didn't worry about it (maybe a newbie error). Now my Coral Beauty has
some bright white dots on it, and it's starting to itch as well.

Could this be marine itch? Should I isolate these two and treat with
Copper Sulfate? I read that pygmy angles don't handle Copper sulfate
very well.

--Kurt

I would tend to think that it is.

Get your water in shape first, something is wrong that's allowing the
ich to take hold. (it will almost always be there in some form, whether
it has an outbreak is another thing).

I've used Ruby Reef's "Kick Ich" in the past and had success with it
treating the parasite. Also, I think a garlic additive and a good
nutritious food for the fish will help get them strong enough to fight
it off.

YMMV.