High quality air diffuser tube. Durable & low maintenance. Excellent for aquaponics fish tanks.
Silicone membrane in a PVC housing.
Airflow - at least 12 litres per minute
20mm (3/4") thread, plus PVC adaptor to change the size of the air inlet. (Decreases to about 5mm (3/8") external diam.)
Membrane is 28mm (1 1/8") diam. x 300mm (12") long. Whole unit, including adaptor, is 395mm (15 1/2") long.
Low maintenance & durable. Murray has been using this type of diffuser in one of his fish tanks for two years, and it has never clogged up. Just give it a wipe with your hand, now and then, to remove any slime on the outside.
Produces a rich plume of bubbles along its entire length. A really good aeration device for your fish tanks.