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I'm working on an inground pool 20,000 gallons, D.E. Filter, Whisper Flow 11/2 H.P. with heavy calcium deposits on the blue tile. I purchased GYSAR "F" Tile Brite Tile Cleaner as recommended to clean the tile. I used 1/8 gallon of GYSAR to 1/16 gallon of muriatic acid & it created alot of foam...