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    undissolved shock (I think)

    Ok so you succeeded in making me feel stupid. It was 2 lbs of cal hypo as directed by the pool store devils. “To be added weekly,” they said. Last year I used only liquid chlorine and don’t remember seeing this accumulation of dust on the bottom of the pool. This year we started visiting a new...
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    undissolved shock (I think)

    Last night was shock night... I used 2 lbs of granular shock. This morning, I discovered random piles of white powdery substance in the bottom of the pool. This has happened before and I couldn't figure it out. This time, I think I have the answer...undissolved chemicals??? What say you?