i woke up this morning to see my yellow platy with red gills and its probably on my other platies but they are red and i probably cant see it,my male platy has a bit of fin rot from fighting in another tank at the lfs, i decided to treat it with maracyn two(only thing i have) sice it treats fin rot and i saw this thing called gill disease on the back i figured theres y cure, can anyone aid me thruogh this