Skimmer help!

So im fairly new to the hobby and purchased a coralife 65g for in sump proflex 2 system and im having nothing but problems with it, ive had the tank up and running for a little over a month but still it is not producing anything worth emptying, i have it finally dialed in perfect so i dont have to make adjustments, my only concern is its not doing its job and i need to have a healthy tank.... Any help would be great! so far ive got a lawnmower blennie, 6 blue reef chromis, a maroon clown with a lta, and a massive brain coral, with about 75lbs live rock that has been in another tank for 2 years.