I just bought a property with a 1/2 acre to 3/4 acre pond. It suffered a fish kill 4-5 years ago. The pond is 10ft deep.

I'd like to install an aeration system but am worried about buying problems. I see kits out there but don't know if that's the best way to go. Brands/kits I've seen or heard of are:

Matala
Sentinel
Gast
Thomas (don't know much about these guys)
Easypro?

Based on what I've read, I'm partial toward the rocker-piston configuration based upon operating costs and reliability.

Any advice on a brand or a kit?