Excellent quality grey/blue air stones that have been heated to a high temperature (1300 C) to harden an aluminium alloy. For the best aeration, the stones' high porosity creates very tiny air bubbles. shock-resistant and corrosion-free.
suitable for ponds, aquaculture, ozone generators, air, seawater, and medical applications.
suitable for ponds, aquaculture, ozone generators, air, seawater, and medical applications.
