Flow rates for sumps and Refuge

[Malster1]

I'm having a few issues with running a 20g Sump and a 18g refuge under my 100 gallon fish tank. I re-plumbed my whole tank over the weekend to add in the Refuge. After hooking everything up again, I was able to get the 20g sump to run fine, but when I opened my refuge I started having issues keeping the water levels the same. Either the sump run's dry or the Refuse run dry.

With both running I have the Sump open all the way on both sides with the flow valves, with the Refuge, I have the drain open all the way, but the return is closed a litte. I was able almost stablize both tanks once, but it still moved one way or the other slowly.

Here is my information on how everything is running:

Sump:
100 gallon tank, one built in overflow box, 1" drain
1" drain to 20 gallon Sump with a AP5400 (1100gph) return
3/4" line to Sea Swirl.

Refuge:
100 gallon tank, drilled overflow at top, 1" drain
1" drain to 18g Refuge with Mag 5( I was told, but it's says something about 9.2 on it) With 1/2" return line that tee's to two different return lines at the top of the tank.

I'll attach a few pictures to see if anyone can help me out. I 've been playing with flow rates and still can't get it right.

http://img.photobucket.com/albums/v297/malster1/th_IMGP0373.jpg (http://img.photobucket.com/albums/v297/malster1/IMGP0373.jpg)
http://img.photobucket.com/albums/v297/malster1/th_IMGP0317.jpg (http://img.photobucket.com/albums/v297/malster1/IMGP0317.jpg)
http://img.photobucket.com/albums/v297/malster1/th_IMGP0316.jpg (http://img.photobucket.com/albums/v297/malster1/IMGP0316.jpg)


Thanks,
Malster1