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Thread: Yellow and Brown Chlorine Stains on New Plaster

  1. Back To Top    #1

    Join Date
    Jul 2015
    Atlanta/ GA

    Yellow and Brown Chlorine Stains on New Plaster

    I had my pool replasted in May, filled the pool, tested the chemicals and all was well. Then I noticed light yellow stains where I threw in some shock and I forgot to keep the pump circulating overnight. The floating chlorinator got stuck on the pool step and created a nice brown stain. Any suggestions on how to remove these stains? This is a new pool for me; I had a pool in Texas for 10 years and never had a problem so I think it must be the chemical reaction with the new plaster. Thanks for your help!

    Sandy Spring GA

  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Central Minnesota

    Re: Yellow and Brown Chlorine Stains on New Plaster

    What color is the unstained plaster? Are the stains bleached out or a darker color than the plaster?

    What type of shock was it? Any copper in the shock?

    What type of tablet was in the floating chlorinator? Any copper in the tablets?
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
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