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Tip: Levels which are too low require the addition of a Hardness Raiser or Calcium Chloride. Recommended range for calcium hardness is 180250ppm. If too high a product that suspends the calcium in water will be needed. Calcium Hardness levels will be tested when you take your pool water to your Pool Professional. Water Hardness CaCO3 equivalent Classification (mg/L) Soft <75 Moderately hard 75–150 Hard 150–300 Very hard >300 < Means less than and > Means more than I hope that wasn't too difficult to understand. Now you know that water balance is about pH, Total Alkalinity and Water Hardness. REMEMBER - IT'S ALL ABOUT BALANCE! 23

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