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If your goldfish is struggling to go down to the bottom of the tank it has a swim bladder problem. There are those who advise a slow raising (up to 80F) and then lowering (down to 55F) of the temperature of the water over about two days for this problem. There are also commercially available "cure alls" that pet shops will happily recommend and sell you. In over 50 years of fish keeping I have yet to see either the temperature manipulation or any of the expensive medications work and fix a swim bladder problem. In my experience the fish will eventually die so I would euthanase it.

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15y ago

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