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  1. It's pooler in AZ

    Is this black algae?

    I hammered out a popoff in my plaster pool and found this algae. This was not visible from pool edge, but under the top layer of the popoff bubble. Green and Yellow algae are things I know how to deal with thanks to this site and great test kit, but black algae. Hold me I'm scared....
  2. It's pooler in AZ

    Nanofiltration of my fill water. What is up with that?

    I need to filter 7 to 10 gallons at 85 PSI per hour worst case during the summer to remove minerals. Any Chemist or Water Treatment expert out there that can help an Electrical trained guy out. My head hurts from four hours of internet search. I am just looking for a filter I could change two...
  3. It's pooler in AZ

    Thanks Ben

    First off I would like to thank Ben. Way back in 1999 he was there with answers. He is one of my heroes. I am a big city Arizona guy with a 21,470 in ground white plaster pool. My cartridge filter is a 175 Sq. Ft. Hayward, and my Hayward Super pump is a two stage 1/8 3/4 HP. I clean the...