Going to make an emergency post I added three new clownfish to my tank around a month ago the new fish have since died and now it seems that my older fish that have been in the tank for months are dying now I need help identifying a disease a bacteria or a fungus of some sort my ocillaris are all dead now and they had white splotches along their bodies and gills and now it's on my sand sifting gobies any help would be greatly appreciated.