I have 2- 1.5" bulkheads for the drain, should I connect them to a wye and run 1- 1.5" line to the sump or keep them seperate. I am only running 400gph on a 60 gal. So far the plumbing has not worked out like I hoped, way too much drain noise. Currently set up for HGB but open to anything other than what I heard when i turned on the ehiem 1260. Help would be most appreciated in this stressful time.