Thanks everyone!
Driftin, we are using 3 Blueline 850 GPH external pumps. 2 for the CL, and 1 for the return which is not pictured. The nice thing about them is they only draw 40 wts. They are kind of tough to find now, not sure why. There was a problem with one of the pumps being loud, but it was an internal problem, even though they were new. The place I bought them sent me another impeller, but it's still louder than the other 2 which are nearly silent. Thinking now it could be the bearing.
Other specs:
Lighting:
2 X 250 10 K Ushios on Blueline E-ballasts
4 X 110 URI actinic VHO's on an Icecap 660
Fuge lighting~ 2 X 65 wt, Current 6500 K PC"s
Protein skimmer:Euro-reef CS 6/1 skimmer with Sedra 3500
Fuge:main return is teed off to 29 gal refugium which returns by gravity to 29 gal sump.
Closed loop:CL works off black ABS draw tube in back of tank, to 2 X 850 GPH Blueline pumps, and returns through 2 SCWD's then 4 locline returns in tank.