Hi! I am a beginner and learning on how to maintain a healthy freshwater tank. I have a 5 gallon tank that I am strating off with. It is a little older than a month now and I recently added two Panda catfish. I have two tetras and two small snails as well. I realized yesterday that my panda catfish were covered in a white fuzz. I have read about it and know that it can be one of two things. They seem to be still doing well, it is day 2 now. One of the catfish have both barbels are missing. When I got him, he did have one missing but now its both and he seems to be in distress. Yesterday I did a 25% water change. Please help. I kind of have no clue what I am doing here but I am eager to learn and seek advice as well as tips. I want to do something to help them today so is there a way I can put them in quarantine?