Buying calcium -- this is ridiculous

[waterbear]

Most of the cal hypo out there these days is 48% since it's classified as a class II oxidizer and not a class III oxidizer so it's safer to ship and store. A one pound bag will raise the calcium in 10k gal. about 3 ppm. This will be a very slow way to add calcium. Evan if you can find the 68-72% stuff it's only going to raise the calcium in 10k gal. by about 6 ppm per bag.