Conducts the 8th stage of the ALPS filtration system. The mineral Stones contain nano silver particles keep the water fresh, alkaline, mineralised, bacteria and virus free.
**Replace every 12 to 18 months.
Place mineral stones in boiling water for 5 minutes, then place outdoors to dry naturally. Spread them evenly to cover the surface area on the bottom of the lower tank. Repeat this process every 6 months for optimum mineral replacement.