Uploaded February 2018 | Updated September 2026, 2 weeks ago

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Do I have to do a water change on my fish tank if I have a filter? When and why do a water change on a fish tank. This is a very common questions. Water changes are a part of fish keeping and are healthy for the fish and the tank environment. The purpose of the water changes are to remove nitrates from the water. Water change quantity and frequency will vary from tank to tank.

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