I have a Red Sea Max E 170 with a trigger sump. I roughly have 60 gallons in total. Red Sea recommends at least 2700 lph flow rate. I am looking at Eheim Compact on 2100; Varios pumps maybe 2 or 4. I am guessing about 5ft of head loss. I am guessing here with Varios 4 highest setting with had loss, I will have 530gph. Thoughts?