Steven asked in PetsFish · 10 years ago

how big will my goldfish grow?

i have 5 goldfish in a 55 gal tank i feed them three times a day how big will they grow

4 Answers

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  • Kitty
    Lv 4
    10 years ago
    Favorite Answer

    Fancy goldfish grow 6-9 inches and need 20 gallons each.

    Common/comet goldfish grow tp 12 inches need 30 gallons each.

    If your fish are fancy you need a 100 gallons.

    For common/comet you need 150 gallons.

    Each atleast, more is appreciated.

    Feed them once a day a big pinch each. Upgrade asap or rehome until the stock is right.

    Source(s): Owner of 6 various types of goldfish
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  • Anonymous
    10 years ago

    They can grow to a full size of 12 inches each.

    Bare minimum size is fry or 1 inch

    We all know through research that a baby goldfish of 1 inch does not warrant the need for a 20 per gallon tank period, each goldfish of under 3 inches only needs a ten gallon tank for movement & growth, anything else is pure exaggeration.

    Source(s): Fresh water biologist
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  • 10 years ago

    What type of goldfish do you have? It depends. Goldfish get huge overall, however, I think 6 inches is about the bare minimum size.

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  • Anonymous
    10 years ago

    25 cm.

    that tank isn't big enough - you need at least 100 gallons for 5

    one goldfish needs about 20 gallons

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