I have 4 returns on a closed loop, which are then split into twos with locline. They are also on an oceans motions alternating between two of the returns at a time. Plenty of turbulence in the water, not to mention the awesome shimmer that it creates with my Radions. Really happy i did It this way. I usually turn off the reeflo which powers the closed loop and just leave on my return pump for feedings. Then when done I turn the reeflo back on and all the extra food will get churned back up and eventually get pulled into my filter socks.