My mom has a 38 gallon freshwater tank that has been nothing but problems. lol There is some disease in it, and I cannot figure out what is going on. Sorry this is so long, but please read! She cycled the tank fishless. Added a few fish, they were fine for a few weeks, added a few more, etc. Then one got something that looked slightly like fungus but it spread super fast. Within a day all the fish had it, and by that night 100% of the fishes' bodies and fins were covered in this, including their eye balls!!! Ugh, gross. The next day they were all dead. My mom treated the tank with an antibiotic and anti-fungal. My mom bought more fish and tried again, same thing. The fish are totally covered and dead within a few hours. So then I helped her do a big cleaning on the tank. Siphoned the gravel, changed filter media, drained the tank of all the water, etc... Tank was ready to go again for fish, so she went and bought some. Within 2 hours of being in the tank, the fish were completely covered, including the stuff attached to their eyes, and by morning they were all dead. My mom is very discouraged and wants to sell everything off. I want to help her! There is one fish, a white cloud, that has lived through all of this, and is healthy as can be. So strange. Whatever is covering the fish and their eyes is white, but not cottony like fungus. It looks almost like brooklynella (but even worse), but that is a saltwater fish only disease. It does stick up a bit off of the fish, but not a lot. And this stuff infects and kills fast! Any ideas what this could be?! THANKS!!