Superfish hi-oxygen airstones are excellent quality gray / blue air stones. These air stones are hardened with an aluminum alloy at high temperature (1300 ° C). These stones have a lot of extra pores and spread very fine bubbles for optimal aeration.
Corrosion-free and shock proof.
Usable for oxygen, air, seawater and ozone in ponds, aquaculture, ozone generators and medical use.