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  1. B

    Replacing the sand in my filter

    Every time it rains I have to fight a cloudy pool. I'm wondering if the sand in my filter needs replacing. The filter was new in 2006 but I don't know if the previous owners ever replaced the sand. I have a 40,000 gallon in ground pool. How often should the sand be replaced and how long should a...
  2. B

    To shock or not.

    If the chemicals are testing fine should you shock anyway?