[Does anybody use the pool hardener from Leslie's Pool supply for calcium supplementation? If so, how much do you mix up and do you mix it with regular RO/DI? Thnx]
[I have used it but have not developed a precise formula yet. I have mixed 1 teaspoon in quart of water and then added that to the sump. Wait a few hours for it to mix good and test. Add more as needed.]
