I have my guppies in a 10g tank with a betta (now moved) a while ago I posted about how my pregnant guppy died, she had red spots on her belly. Now two of my others are swimming funny, they can't use their tail fin? And seem to be a black/grey colour, what is going on?? I have them in the tank by themselves and I put the other two in my main tank, I also noticed that one of the males is missing some of his tail but i'm not sure if it is related or if the betta had a nip at him.
Any advice??
Any advice??