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- 16:22, 15 August 2019 Leebo talk contribs created page Calcium Hardness (Created page with "Calcium hardness (CH) is the direct measure of the amount of calcium ions (Ca2+) in your pool water. Calcium hardness is different from total hardness (TH) or general hardness...")
- 19:59, 12 August 2019 Leebo talk contribs deleted page Calcium Hardness (content was: "Calcium hardness (CH) is the direct measure of the amount of calcium ions (Ca2+) in your pool water. Calcium hardness is different from tota...", and the only contributor was "Leebo" (talk))
