I'm presently running a Mag18 as my return pump on my system -- Total volume aprox. 200 gal incl. sump. Figuring in the losses my total flow from the pump should be around 1200 gph or roughly 6X total system volume. In the past few months I have read a number of post recommending a slower flow through the sump. Do you guys think that 6X is to high? If so what is the recommendation for flow through the sump? I have seen anything from 1X to 4X system volume.