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ACID DEMAND: The amount of acid required to adjust the pH.
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ALGAE: A microscopic one-celled plant that discolors water.
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ALKALINITY (Total): The amount of alkaline material in the pool water.
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ALKALINE: A condition when water is above 7.0 on the pH scale.
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BACTERIA: Invisible living germs that may be harmful to swimmers.
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CALCIUM: Metal ions in water that form salts as calcium carbonate.
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CHLORINE: A strong oxidizing agent used to sanitize water.
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CHLORINE, AVAILABLE: Amount of chlorine available to kill bacteria.
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CHLOROMINES: The combined chlorine that has already oxidized impurities.
These cause eye and skin irritations.
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HARDNESS: The amount of calcium or magnesium dissolved in water.
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MURIATIC ACID: A liquid acid used to lower pH and total alkalinity.
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pH: A measure of acidity or alkalinity.
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ppm: An acronym for parts-per-million.
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SUPER CHLORINATE: Shock treatment of up to 10 ppm.
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SCALE: Minerals precipitating and adhering to plaster and tile.
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STABILIZER: Cyanuric acid used to protect chlorine from UV rays.