inverts like their salt. they'll die without it.
if you can, isolate the fish and drop the salt. i had a smokin link for this at one time, make sure you use a refractometer to test your salt, not a hydrometer, as they're far from accurate that low.
It was written by the guy that does the chemisty forum on reefcentral..I can't find it off the top of my plate, but I'll keep looking.
All I can remember from it is you have to drop your salt to 1.009 in 3 days, then leave it there for 6 weeks. Don't change the pH or the temp, leave it normal, otherwise it causes un-necessary stress. Feed vitamine enriched food.
hth and good luck
