I have a soaking size pool, outdoor, that has yellowed/orangeish staining on the grout above the water line. It was like this when we bought the house last year. How can I clean it off?
well, i will second the part where you say "rinse quickly". muriatic acid is going to eat up the grout, cant leave it on long. I use a 50/50 of diluted bleach and spray it on and let it sit until it dries, and then rinse and scrub with a nylon brush and works great.
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