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    Optimum CYA level

    We live in Texas and have an outdoor 16,000 gallon vinyl lined pool. What is the optimal CYA concentration to shoot for? Typically I aim for 40 ppm CYA just because 40 is in the middle of the 30-50 ppm target range. This seems like a too-simple reason to target 40 ppm; hence my question. Maybe...
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    Baptistery Care Suggestions????

    Hi. I have just been asked to take responsibility for our church baptistery. The baptistery is a 400 gallon fiberglass structure with an electric heater and small circulation pump. The baptistery is probably 20-to-40 years old. The goal is to keep the baptistery full and somewhat warm 24/7...