Persistent cloudy water can indicate filter failure. If you have a sand filter, do the DE test -- http://pool9.net/de-test/.

If you have a DE filter, open it, clean it out, check it, and restart it.

If you have a cartridge filter . . . you probably need new cartridges, made by Filbur or Unicel (they also make most of the OEM cartridges). Tell us the make/model of your filter so we can find one for you. (DO NOT GET AN ASIAN MADE cartridge, like what's sold by most pool stores!!)

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