I believe this is the disease that killed my ocellaris and two yellow tail damsels seemingly in a a day. Fish seemed healthy and ate Firday night. Saturday I woke to two dead yellow tails and ocellaris blowing in the current at the surface to be dead about and hour later. I have my hippo and Goby in QT after a formalin dip for 45 minutes. The tang still has black marks above the gills(will post pics when I get home). Do you recomend a second or third dip or is one sufficient? The tang is hidding still after a day and I would hate to stress more for no reason. I will continue to monitor to ensure that I am treating the correct disease. If it is brooklynellosis how long should I leave my display fishless? I would hate to reintroduce the fish after treatment only to infect them again. TFTH