Originally Posted by Akdutchman
Thanks for your response. I have them set in the deeper parts of the pond now and running them 24/7. It was suggested to me by a fish hatchery owner, to not run them in the deepest parts but in my case in about 10-12’ of water. They said the diffusers work more efficiently at shallower depths. I have also read not to run them in deep water in the winter, so as to not disturb the warm temperatures. I live in SE Iowa. I think I will move them to shallower water in the winter. I am open to any advice. What I am learning is there are about as many opinions as there are Ponds.

I don't know who made your diffusers. Here is a chart from Vertex. As you can see, the diffusers work more efficiently in deeper water than shallow water. Now the deeper the water is where the diffusers are placed? The less air the compressor spits out. But I agree with Bill, put them in the deepest part of the pond.

When we calculate an aeration system for a pond, we like to see more than 1x water volume lift rate/day. That allows for decreased lift rate as the system ages or the diffusers get covered with bio-film and don't work as efficiently.

Now for the winter, what we do is run another airstation (diffuser) in 1/4 to a max of 1/3 total pond depth, and within roughly 20 feet of shore. That one runs in the winter to keep an open hole and the ones in the deepest part of the pond are shut off. No messing around when it's cold out with wet, muddy, self-sink airlines. We shoot for an open water area that is 1% of the total pond surface. If it is a bigger pond, then we run enough airstations to get that number.

[Linked Image from i.imgur.com]\

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).