would this work?

[spikehs]

i am looking at minimizing the amount of equipment I use on my tank, I wanted to have a canister filter for some carbon and poly-filter, but also need a return pump.... Would the following work?

I have a 50gal tank (36 x 18 x 18) w/ a 20 gal sump. If I had the intake in the sump, and the return in the main tank, do you think i'd get enough flow?
I am looking for quite a slow flow through the sump, so if I got 2 x 3 turnover that'd be good enough for me...

comments? suggestions?