Black Spots


Black spots in goldfish, koi , and other coldwater fish often occur as a result of ammonia surges in the water. The black spots can appear on the side or back of your fish. Frequent partial water changes will help to correct this condition and the color on the goldfish should return to normal within a few weeks.


goldfish with black spots
Fantail goldfish with black patches (spots) - an indication
of ammonia burn.



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