Hi everyone Im a bit new here and cant seem to figure kut whats going on in my heavily planted 75 gallon tank. Recently I noticed one of my. candycane tetras have a fuzzy cottonlike spot on his body. The next day he died this has recently gotten around to two more tetras and Im starting to get worried . My water paramters are all fine as well Ill include some pictures to allow everyone to try and help me. Its all appreciated in advanced thanks again! once the fishare affected they lose ability to swim well and i find them hiding on the bottom of the tank