A cluster of mineral stones that infuses your water with zinc, iron, magnesium, potassium, and calcium.
(Replacement stones. Does not include White balls. In Plastic Holder. Stones may be removed from Plastic holder easily and placed directly in bottom tank.)
Replace these stones every 2 years. Mineral rocks should be removed and boiled in water once per month and replaced after two (2) to maximum five (5) years
