brown stain

  1. D

    Pea sized black spot

    Hello Fellow Pool Boys and Girls, We just finished building our pool about a month ago. Unfortunately, we've developed a pea sized spot with a black center and brownish cloud moving away from the center. I tried placing a chlorine tab on the spot, for approximately a week, and brushed...
  2. V


    When I opened my pool this summer, my spa ( where the water had been lowered and 2 pillows used to support the cover, had a brown stain above the water level. I thought it was organic but after many shocks, the stain remains. Also found a little brown stain at spa light. Other than that, the...