You can acheive the same results using a single airlift and it is much easier to clean. This is through the sidewall, if you don't want to have to build a stand due to going out the bottom.
https://www.youtube.com/watch?v=MR7ZTrZQuFg
The results are virtually the same, whether you create a vortex or not. It is really the airlift which is the champion. (and diffusion chamber in our case) Of course a cone bottom tank ensures a really thorough mix with no settling.
Do you have any data on the Progress Earth inputs as far as microbial population created?
https://www.youtube.com/watch?v=MR7ZTrZQuFg
The results are virtually the same, whether you create a vortex or not. It is really the airlift which is the champion. (and diffusion chamber in our case) Of course a cone bottom tank ensures a really thorough mix with no settling.
Do you have any data on the Progress Earth inputs as far as microbial population created?