I have a brown slime that is attacking my corals. So far i have lost my colt coral, which was up to 10" in diameter, i've lost my grape hammer, green fuzzy mushrooms, several of my feather dusters.

I have checked my water for copper, which is safe, I am meeting all of my water parameters.

I am at my wits end, does anybody have any ideas. Thanks so much for your help in advance.

Harold