A picture would be helpful.
Where do you keep them now. How big a pond or aquarium, how many fish, how often do you do water changes, do you dechlorinate the water before you add in with the fish, what kind of filtration, have you tested the water for amonia, nitrates, nitrites, gh, kh and PH.
Water temperature, have you added any fish or plants lately and were they quarantined beforehand.
Answer as many of the questions you can.
Cindy
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