Ich?

[marie]

A quarantine tank can be as simple as a rubbermaid container with a heater and a powerhead.
If you have an old hang on back filter hanging around you can keep the sponges for it in the sump of your main tank and when you need to set up a hospital tank, the sponge is already seeded with necessary bacteria to process ammonia (Just don't run carbon in the filter if you need to medicate)

If what you have is marine velvet then the only treatment that worked for me is copper.

Also google brookynella, it could very well be that

[Red Coral Aquariums]

Set up a quarantine as Marie said but use water from your display. Medicate and make sure you have a constant temp and some air/flow. Do small water changes from water out of your main tank 5% x2 times a day. When he clears up acclimate (even though it will be nearly the same water minus the medication) it into the main tank. Keep us posted.
Kevin

[ElGuappo]

i just set up a 10G QT tank a week ago it contains only a korialia nano a heater and rock.

my clowns developed something that was eating away at thier gills and fins. i dosed with maracyn for five days now its 5 days later and their about 5 days from getting back in the display. i have been doing bi weekly 15% waterchanges.

[Tigerarmy]

Thanks, I checked them again this morning and it seemed to be all cleared up? I got a cleaner shrimp in there...but other than that i have no other explanation as to why he looks good all of a sudden? Thanks anyways though