Figure For Flow *3 times fast

[geraldwhite]

I'm planning my 200 gal reef... I have a few questions..
This is going to be a closed loop system, so right now I'm just trying to figure the flow from the Tank to the sump/refuge and back...
The Skimmer I am using will be a Deltec ap851, which is external from the sump, it requires 350gph...
Now should I plumb this off the protine skimmer with a pump slightly higher in rating like 400gph...
I was thinking my return to the tank would be a pump rated for 600gph or 3x the tank volume above...
does this sound like a good plan or are there other things to consider?

 

[geraldwhite]

Ok, after doing some more research I desided that the sump needs more like 8x flow, and that i'm going to gravity feed the protine skimmer so that a lager part of the water will be skimmed..