My white mollie has developed a brownish/green area along her whole back from head to tail (not sides&belly though) Even the black markings that shes always had on her top fin seem darker) Her tail is curved off to one side and she is swimming in circles. I put her in the net and fed her and she ate like she was starving. Right not I have her in a salt bath. Any ideas as to what is wrong with her? And what to do?