Anyone interested in a low-back pressure diffuser should check out Mix Air Tech diffusers. Cary Martin sells them as well as Keystone Hatcheries. The material is designed for wastewater treatment plants where they are concerned with low back pressure from their blower systems. when placed against other diffusers on the same compressor, the Mix Air will rob most of the air from the other diffuser. We did the tests in our trout ponds against the tube style and the membrane discs. Had to turn the air way down on the Mix Air's to equalize flow.
