I think it might depend on how much of the pond volume is below the 10' mark....

Yes, he's running the bottom diffusion aeration system 24/7/365. Switching from shallow water diffusers during the winter to deep water diffusers during the late spring/summer/early fall.

www.hoosierpondpros.com

[Linked Image from lh6.ggpht.com]
http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).