I`m thinking along Pat`s line on this. Even if the diffusers are setup 12"-20" off the bottom it`s still creating a vacuum draw of water that pulls dead water from below and lifts it. Placing aeration in my opinion would be the most important thing. If the system is undersized that I could see causing dead zones, that are not moving with the upward flow.
Last edited by Snakebite; 07/07/20 08:58 AM.
