Where's your drain, and how will it discharge to the sump? And, where is the return pump going? I would assume the drain would feed the left section where the skimmer is, and there will be a submersible return, maybe the Mag 12 in the right side?
Adding two simple bubble towers to recieve your drain and skimmer discharge will help too. You can get much fancier with built intowers, but just a piece of 4" scd 40 PVC with some 1" holes drilled in the near the bottom will do.
On your earlier skimmer question, I have no experience with the AquaC, but do run mesh modded Sicci on my ASM (which I think the Octo does too) and I like that skimmer a lot!
How about some fresh coral pics?