Tom, it all depends on your budget for the project. I've been working with a Homeowners Association that has a 19 ac pond that is roughly the same depth as yours. When it is all said and done, the aeration system will be a combination of bottom diffusion aerators and surface agitators.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).