My platy has recently been not eating much (although she is still eating some) but shes been getting noticably skinny and her fins are all clamped up and she hides behind plants all day. I had 2 other platies who did this same thing and then died shortly after! it seems to be spreading from one platy to the next. I heard it might be stress related or maybe even parasites??? the water condition is good and I just did a full water change yesterday, and I do 25% changes every few days but i'm really worried about her. if it is parasites I really don't want it to spread to the rest of the fish. what is going on with her and how can I treat whatever it is?