I have recently revamped my system by adding a sump with a refugium. i built my own sump out of a 10gal tank with three chambers. Along with; a DIY overflow system made out of 3/4 pvc. I used flex tubing to move the water from place to place along with a ball valve after my return pump so i can control the flow. My issue is that i believe that the pump that i bought might be too big for the amount of water coming in. The pump is a Rio+1100 (382GPH) but with my vertical pipe it ends up being around 180GPH. Even with the ball valve to control the flow the pump sucks the sump dry. Could anyone recommend what i could do. whether it be go to 1" pvc overflow system or down size my pump.