free chlorine low after shocking pool

Free Chlorine FC of 10 ppm is rather high normal level is 1 to 3 ppm but can go up to 10 ppm or higher when shocking the pool aka superchlorinating. Add alkalinity increaser to raise from 40 to 80.

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For every 1 ppm of free chlorine added Cal Hypo also adds 07-08 ppm of calcium to your swimming pool.

. Shocking your pool with calcium hypochlorite will help ensure your pool is well-defended against bacteria algae and other water contaminants. Alkalinity is Low at 40 ppm proper range is 80-120 ppm. Low alkaline water.

HTH Super 3 Chlorinating tablets keep your swimming pool clean and clear with a 4-in-1 formula that sanitizes pool water and protects against chlorine loss due to sun exposure. This formula includes built-in algae protection and clarifier for an amazing value in DIY pool care. Total alkalinity is connected to the pH level of your swimming pool.

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