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    Replacing water in a vinyl liner pool

    My CYA is high (100 ppm), calculator tells me to replace 50% of the water. How much can I safely drain? Do I need to use a vacuum when the water level is below the skimmer? Can the water be replaced a little at a time?
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    Best month to open my pool

    I'm considering opening my in ground pool within the next few weeks before the green stuff gets a chance to grow. Current temps are highs in the 50s and 60s with lows in the 40s and 50s. It does not appear that we will have any more hard freezes below 30. I live in NW Arkansas. Any advice? When...
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    Using DE in a sand filter

    Is it safe to use DE in a sand filter? If so, how do you add it, how much and where do you get it besides a pool store? Is it effective? Will it really aid in spring start up?