I was installing some tiles on my waterline, and dropped some grout or thin set in the bottom of the pool, which hardened and when I hit with my brush I see a dark spot like the plaster came off and the gunnite is showing. Its about the size of a nickel... what to use to fix it, maybe EZ Patch #1 fs? any ideas. Thank you as always..The pool has been running just great thanks to this forumn.
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