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Generally a filter on a fish tank needs to be replaced once a week. If the fish tank is especially dirty, then it may need to be replaced more often than that. Generally, the more fish there are in the fish tank, the more often the filter will need to be replaced.

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11y ago
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11y ago

How often a water filter needs to be changed depends on the type of water filter, and all filters have a different life period. Faucet water filters may work efficiently up to about 6 months, whereas water filter pitchers or less efficient faucet filters may only be good for 1 to 3 months.

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Q: How often do water filters need to be changed?
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