I don't know much about aeration, but it looks like you've got most of the pieces together. Just curious, is that box where your pump will stay? If so, what about venting to keep it cool? I couldn't see any vents or open places in the pics, so you may have them there, but I just didn't see them. I think that's a key factor in pump longevity.

Todd La Neve

[Linked Image from i108.photobucket.com]
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1.5 & .5 ac ponds - LMB, BG, RES, YP, GC, HSB