The Hiblow septic air diffuser was specially designed for Hiblow aerators. The pour size on the diffuser is more porous reducing back pressure on the aerator. Having a larger pour size also allows for an extremely long time between needing to be changed. Flow is 80 liters per min most systems us two diffusers in them. Microbubbles are a perfect size and distrubute the oxgen needed in any environment perfectly. The diffuser is ideal for use in septic or pond aeration.