Why Is My Goldfish Turning Black?


The reasons a goldfish turns black could be due to too much ammonia in the water or over feeding. It can also be due to overcrowding of the gold fish in a tank that is too small. By correcting these things, the fish can turn back to gold.
Q&A Related to "Why Is My Goldfish Turning Black"
The blackening of your fish's tail is most likely an ammonia burn. Do a large water change and cut back feeding to 2-3 times a week until the ammonia levels go down.
Goldfish have several different types of skin cell that determine the coloration of the fish. Those present in black coloration are called melanophores and they contain melanin, a
If it is just black spots, your fish is probably healing from ammonia burn. They
Not Medical Advice: If a goldfish is turning black, it can be an indication of a scar tissue from toxins in the water such as ammonia or nitrite.
1 Additional Answer
Chances are your goldfish is turning black due to a chemical burn. Check your water chemical levels. Usually turning black indicates too much ammonia in the water. You can find more information here: http://thegab.org/Illness-and-Treatment/what-is-wrong-with-my-fish.html#BlackSpot
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