Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: Black algae?

  1. Back To Top    #1

    Join Date
    Apr 2007

    Black algae?

    We noticed thin black streaks on the sides and bottom of the pool. At first I thought it was the vacuum leaving marks behind. I'm not so sure of that anymore. I scrubbed some of the streaks with a wire brush and then rubbed a chlorine puck on each but they are still there. Does anyone have pictures of black algae? And solutions for ridding it. Thanks.

    22X44 freeform gunite with DE filter (44,500 gallons), 4 deck jets

  2. Back To Top    #2
    Black algae is usually in the form of circular patches that start small (about the size of a coin) and get bigger with time. It takes a long time of too low a chlorine for it to start and is really the sign of pool pool maintenance over a perioud of weeks or months.

  3. Back To Top    #3
    gonefishin's Avatar
    Join Date
    Apr 2007
    Joliet, Il.
    Could you take a picture and post it in this thread?


    21' Aqua-Leader AGP (10,200 gallons).
    Hayward cartridge filter and two speed pump.
    Aqua-Cal HeatWave 100k (HeatPump)
    Salt 3200ppm (in non-salt water pool)
    Borates 20ppm (slowly raising)
    Aqua-Rite SWG

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts