>>5711096>make an explosion and also chlorine gasCould do, but that's more dramatic and lethal than what I was going for...
>Calcium used to control pH, not watr hardnessI actually work in a related field and deal with pool wtaer chemistry, and can assure you this isn't the case; various acidic and alkaline compounds are used to adjust pH levels, while Calcium is used to increase what is referred to as "total hardness" or "water hardness" in markets where wate ris too soft. 