thank ED but i wont messing with that cuz i still a rookie at this hobby ...and im not that handy like you ....but this's the pump that i was thinking to get Little Giant 4-MDQX-SC Aquarium Pump (rate 1325gph) is it true the pump cant be strong than the draine ..? tell me if that pump good to go with the rate of the overflow i'll order it asap..oh by the way the filter is oceanic #3 thanks guys