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    Cyanuric Acid blues - draining pool

    Hi all - I installed a new pool myself last May, an 18x36 vinyl liner 3ft shallow and 8ft deepend, and went overboard on the 3" Cl2 pucks. A few weeks ago my CYA level was around 150 and when I tried to drainoff the pool to replace the water my liner started to freakout and bulge and wrinkle...