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  1. M

    Cobalt stains in Fiberglas pool, need help

    Hello I got fiberglass pool and it was resurfaced 5 years ago. 2 years later I started getting Cobalt spots. Local pool cleaning company (Pinch a penny) try getting rid of it and it was unsuccessfull. I found that United Chemicals “Cobalt Cure” worked great but was discontinued and Can’t find it...