I'm working on a new sump and one end of it already has a 1 3/4" hole cut into the bottom and I plan to put a 1" bulkhead in it to feed my return which I want to be external and is a mag 18. I plan on running a series of four baffles and incorporating a section in the middle to hold all my excess liverock. 3 of the baffles will be over under over and will seperate the skimmer/rock area and the last baffle which is an over will go to the return compartment which I have figured needs to be a 9" space between the last baffle and the side wall of the sump. The sump will be elevated onto 6 4X4 blocks to allow me to plumb the bulkhead to the ball valve and then on to the return pump. What is the best way to plumb the inside of the return compartment...? I'm not sure that drawing straight off of the bottom is the best idea...maybe raise it a few inches and fit two 90 degree elbows together so that I'm drawing low...but not from the direct bottom. What do you guys think?



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