From what I have researched, ACV helps disolve unuseable calcium. To get rid of kidney stones, you might consider using 1/3 teaspoon of ACV and an equal amount of virgin cold pressed olive oil 8 times a day plus eat as much watermellon as you can stand. Cranberry juice would also help. Avoid eating any kind of meat or fats and thow out any kind of margarine and never use that garbage again if you do. Stay away from any kind of beverages with refined Sugar such as alcohol or sodas and nothing with caffeine until the stones pass. When they do pass, ACV will help prevent further calcium build ups in the future. I would also suggest staying away from tap water.