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Why do goldfish dart about tank?

Updated: 10/6/2023
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11y ago

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If your fish is darting around the tank, it's likely a water quality issue. You should test your water for ammonia, nitrites and nitrates which should be 0, 0, and less than 10 respectively; if it is not, do an immediate 75% water change making sure that the new water is the same temperature as the old water, and that you add the recommended dosage of water conditioner per the instructions on the bottle.


To keep your water at it's best, goldfish need at least 20 gallons for the first fish, and 10 gallons for any other fish after (so 2 fish need 30 gallons), and perform weekly water changes of at least 50% following the same instructions above.

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11y ago
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11y ago

If your goldfish is trying to escape the tank, then it's likely that you have a water quality issue.
You should be testing for ammonia, nitrites, and nitrates which should be 0, 0, and less than 10 respectively.
The best way to keep these number in check is with regular water changes of at least 50% once a week, more if your tank is overstocked (one goldfish in a 20 gallon, two in a 30, three in a 40 etc).

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11y ago

It may be that the fish wants to find a larger habitat, or simply that it enjoys jumping.

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14y ago

Well it could be chrolrine from the water which burns them which because you have not added water conditioner to the water or it could be just very hyper.

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14y ago

They are trying to get away.

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Q: Why do goldfish dart about tank?
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