Ok so the 1750 is only running through your sump? You are going to then split your returns through the holes in the bottom of the tank?
I see two problems there, too much flow through the sump. Well, how big is your sump? You really do want slow flow through the fuge, Calfo for surface water removal (nasty stuff goes to the surface, you want it to go down into your sump) oversized skimmer, and light bioload.
The other problem is that if you T off your return and do not add powerheads, you won't have ample flow in your display tank for detritus suspension, imho.