Quarter, a thermocline will often develop "under" the level of the diffusers, so yes, you will probably develop a thermocline/toxic-water-zone in the deepest portion of your BOW. The circulation will set up a pattern, and water density due to the temperature differences will have more impact than you may realize in preventing a good mixing.
And yes, you can have "too much" turbulence, yet it's unlikely to happen in your case.
As you say, yours is a "small hole of water"....Set your system up and after a few days, take a swim and see if you feel "colder" water in the deepest areas....
The diffusers set at a 4' depth will not have near the lift capacity that the single diffuser in the 10' depth will have....I do not know the formula (if there is one) for lift, but do know more depth exponentially increases lift capacity over shallow diffusers.
Last edited by Rainman; 05/15/18 01:29 PM.
