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(About 3 weeks (maximum!))

The average time aquarium fish would survive is between 1 week (for small, fast energetic ones); to 2 months or so for fatter goldfish. However I wouldn't leave my fish for that long (Maximum 1 week) Also don't leave them alone with no food all the time as this will develop fish problems and even death of your fish.
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10y ago
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6y ago

A betta fish can live 5 days with out food.
Most fish can go long periods of time without food. But dont make it a practice. It's cruel to leave a fish unfed for long periods of time!

A betta should do fine for 3-4 days without food, but make sure it is fed as regularly as possible to enhance betta's health, immune system (nothing will live long if it's sick and starving now will it?) and life-span.

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14y ago

I have five fish and I haven't fed them all their life because I can't be bothered too. ( I am not lazy though! )

They seemed to have survived but they do live outside and there is lots of Algae in the pond for them to eat. I think they eat Algae.

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11y ago

They will be fine for up to two weeks providing you have plenty of plants in your pond.

Leave your pump and filter running while you are gone.

The Koi will live on plants and alge.

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14y ago

Around two days but i would not try it just feed it every day

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13y ago

upto 2 weeks

dont try it

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14y ago

1 weeks

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11y ago

3 days

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Q: How long can koi fish go without food?
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