DY 102-D 50x200ml Air Stones

Excellent quality grey/blue air stones, hardened with an aluminium alloy at high temperature (1300°C). The stones are very porous and produce very fine air bubbles for optimal aeration. Corrosion-free and shock-resistant.
Suitable for oxygen, air, seawater and ozone in ponds, aquaculture, ozone generators and medical applications.