WaterTreats Silica Glass Med Pore Airstone 1 1/2″ x 1 1/2″x 6″ w/ 1/2″ Male Thread 0.5 cfm

• Introduces oxygen into water
• Perfect for applications in tanks and small ponds
• Top quality and best performance airstones – made in the US from a solid piece of glass bonded silica
• Low maintenance – smaller pores equals less chance of clogging, if they need cleaning, just give them a wash in a acid bath (recommended yearly)
• Long-lasting – material quality means that the stones won’t degrade over time like alternative stones do (if properly cared for)
• Self-weighted
• Air stones have a low air resistance – meaning they are great at pushing air through their pores