[Canadian Man]

I have decided not to use the SCWD's on the closed loop for the 230 and just to plump the closed loop to the returns on the side of the tank, 2 1" bulkhead's per side. The other return will be from the sump which will go over the eurobracing on the back and come to 2 1" or 3/4" outlets. The sump pump will also power stuff like the refugium feed and eventually the frag farm feed.

The tank will also have 4 mj 1200's on a wavemaker for flow.
For the feed to the refugium and frag farm I am not looking for flow I am just looking for the tanks to be tied into the system.

The closed loop pump will have a 1.5" intake and the output will be plumbed with 1"pvc. it will have a T and then going to 4ish 90 deg's per side. I could use flex pipe.

The sump return will have a 1.5" intake for the pump and then either 1" or 3/4" plumbing for the return and it will have 2 90's then a T and then 6 more 90's in total split between 2 outlets.

Ok so I have 2 pumps. A little Giant 4mdqx-sc which is 1400ish gph and not a pressure pump. A Mak 4 which is more of a pressure pump and 1200gph.

Which pump would you use where?