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    Dirt or Algae?

    I've searched this forum but couldn't come to any conclusions on the following. My pool has accumulated some dirt like debris in certain areas. They brush away easily but eventually return in the same spots. This debris is more concentrated by the return jets so part of me thinks this may be...
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    Main Drain Cover question

    I have a question on my main drain covers. I have two main drains that sit in the center on the floor of the pool that also happens to be the deepest part of the pool. I was thinking of replacing the covers to ones that are the anti-entrapment compliant cover. The main drain covers I have now...
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    TFT testkit TF-100 question

    A couple of questions on this testkit. I noticed the description of the Combined Chloramines test says it can measure CC's down to 0.2 ppm. I was wondering how to achieve this measurement? The instructions say to add 5 drops of R-0003 after the FC test. If it remains clear there are no CC's...