I do a weekly water change....   The skimmer is not brand new.. Its actualy a used one purchased off of AJ77  

  If I can get it to pull some skimmate I will be happy.    Maybe the tank is good and clean already but since I have alot of cyno I figured I may have a large quantity of DOC that my weekly water changes are not keeping up with.  
This cyno is very frustrating  

  I keep on turkey basting the rocks and corals to keep it clear.  But within a day its back.  
 
I've read that using a slower PH like a Maxijet 600 or 900 would work better on this skimmer than the 1200  

   Any thoughts?
thanks 
Chad