Kidney stones can be made of different materials, depending on what’s going on in the body. There’s even more than one kind of calcium stone. The proper treatment depends on the kind of stone, the wrong treatment can make it worse, and it’s best to ignore glib, uninformed treatment instructions. In particular it’s tricky when you’re trying to get more calcium into your bones but less calcium into your urine, and this balancing act benefits from thoughtful medical attention. The general recommendation to stay properly hydrated at all times seem to be reliable for most of us, though.