I have started a 10g skimmerless nano-reef WF. I have a sand aragonite substrate and 10lb of LR. I have a Maxi-jet MP 400 in there now and would like to put a ZooMed powersweep 212 in there. THe Maxi is stationary. How would you suggest placing the 212 relative to the MP 400? Opposing flows? Same direction? What are the "basics" behind making this decision?