Desperate

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TF-100 test kit. 24' round AG w/main drain, 15000 gal, 3/4 hp Jandy pump runs 24/7, 30" Hayward sand filter, puck chlorinator. LP gas heater, oversized. Liquid chlorine to shock. Pool is not at our main residence, can't check it every day. Short swim season! Pool doesn't freeze in winter, water gets down to 42 degrees.