You will have to try it and see. You can always throttle the pump back iff needed. The overflow can handle it but I don't know how much you are restricting it with your setup. I have read of some that get 1000 or so gph
out of the modded Megaflow. I might be off a bit on the gph
but I think that it is close.
I have never ran a skimmer like that so I cannot comment there.
*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
*100 gal prop tank plumbed into main system w/ 2x96 PC lights and 1x150 MH,