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  1. C

    Blue/Purple Stain

    This has not been my year. I have gotten some great advise on here and I am back for a little more. I am using the BBB method and my numbers are as follows: Free Cl 16ppm Combined 2ppm Total Chlorine 18ppm PH 7.2 Alkalinity 100 CYA 100 My problem is that I have a blue to purple colored...
  2. C

    Black Algae

    I am having a problem killing some annoying Black Algae that has started to grow in my pool. I have looked at many sites and they provide some useful information for concrete, plaster and other non-vinyl lined pools. Many of the suggestions involve scrubbing with a wire brush and pouring...