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50000 gal in ground plaster pool.3'6" on each end to 5" in center. July 2nd CYA 71ppm.drained pool half way.cleared up.July 8th CYA 80.drained 2/3rds pool.cleared up.today July 13th CYA 80.[Language Edit: Butterfly].use 3 inch trichlor tablets plus granulated as needed. Chlorine upper end of...

my name is RickyB and live in Temple Texas.I do apartment maintenance.we have a 50,000 gallon pool with 2 sand filters,a 28000 gallon volleyball pool with a sand filter and a hot tub with sand filter on property.I am learning as I go.never had any dealings with a pool except for swimming in them...