water flow?

[TheReefGeek]

Have you chosen a skimmer model yet?

I would use the drain lines as the water feed to the skimmer, and depending on the configuration, use the pumps as recirculating pumps to increase efficiency of the skimmer, if they aren't already.

[jaydsl]

well thanks guys that helped a lot i'm building my tank and sump so i was going to drill it any way so that is not a worry and this is what i has thinking of for a sump http://www.melevsreef.com/dfwmas/plin/115g_sump.html

just a little smaller