Two Tanks, 1 Sump

[samwrang]

I'm trying to figure out my plumbing to incorporate a frag tank. I have an established 200G with 50G sump. I'd like to include a new 50G frag tank with possibly a small fuge.

Can I link the frag tank to this system to improve the water quantity? The overflows, and pumps seem to get tricky without risking some serious flooding by pumping from one tank to another before hitting the main return back to the big tank.

I do have another skimmer available, am I better off running two completely seperate systems - side by side?