Once you replace the filter, it can take up to 3 days to clear. This is a slow moving product due to the fact that we do not want to harm any fish. Wait 3 days, a full 72 hours. If it has not totally cleared, re-dose. Usually, 1 or 2 doses is all you need, but if it does not appear to be clearing, test your pH, and alkalinity as acidic water makes the product less effective, as does extremely hard water.
answered 2 years, 8 months ago
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