my froggy passed away and now i fear my angels got ich. she had a bad experience with some dwarf puffers and they ate some of her fin. now the tips of her fins look like their covered in a white film. also theres a whit ball like cluster hanging from one of the wounds. theres two yeast like spots on her fins as well. none of the other fish have it on them . what should i do how do i know what it is?