“Alumina” air stones – three times stronger than white silica air stones! Produces a finer bubble with no increase in pressure.

Inlet fittings are set into the body of the diffuser, making them much less likely to break or twist loose.

All are 1 1/2" X 1 1/2" Square 
Available in 1-1/2", 3, 6 or 12 inch lengths.

AS15 Alumina Airstone – 1 1/2" – 3/16" barb (flow rate 0.2 cfm)

AS325 Alumina Airstone – 3" – 1/4" Barb (flow rate 0.3 cfm)

AS337 Alumina Airstone – 3" – 3/8" Barb (flow rate 0.3 cfm)

AS637 Alumina Airstone –  6" – 3/8" Barb (flow rate 0.5 cfm)

AS650 Alumina Airstone –  6" – 1/2" NPT (flow rate 0.5 cfm)

AS937 Alumina Airstone –  9" – 3/8" Barb (flow rate 0.75 cfm)

AS950 Alumina Airstone –  9" – 1/2" NPT (flow rate 0.75 cfm)

AS1237 Alumina Airstone – 12" – 3/8" Barb  (flow rate 1 cfm)

AS1250 Alumina Airstone – 12" – 1/2" NPT  (flow rate 1 cfm)