I have a newer RSM 130D with the single pump upgrade. With one pump you only have one choice where to point the outflow eyelet. Currently I have it pointed just below the surface of the water to keep the surface turbulent. I am starting to get a bit of cyano on the sand bed in areas behind my LR where there would be less flow. Where do others with only the single pump have their pump pointed? The design should be with on pump but to outflow eyelets for better distribution. Anyone have experience with this?