I have a 240 gal pond and I noticed my black moor goldfish has white spots but shes eating fine and swimming as usual all my other fish are fine and my water is clean. The only thing that I could think of is that my chicken fell in my pond and sadly passed away. My other goldfish had white streaks on her tail but they've gone away after a week. Ive never had any problems with sick fish because I always quarantine them for a week. Should I take out and treat my moor fish or should I treat the entire pond?