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    New plaster with brown spots

    IG pool and spa/ 28.5K/ 12 year old, with 4 month new plaster/ Purex FNS60 DE filter/ 2HP centurion/ polaris 360 Houston TX suburb FC 4.0 CC 0.0 ph 7.4 TA 105 CH 225 CYA 90 I had a replaster job in February. Within a couple of weeks, brown stains along the edging of the toe tiles was...