I have a standard 120 g 4x2x2 with a mag 9.5 return pump, a magnum koralia (forgot which one, it's big though) and one small koralia for flow. I'm purchasing a mp40 tonight. Would you continue to run the koralia's along with the mp40? Will the Koralia's mess with the way the mp40 creates it's different types of flows and crests. I also have flow accelerators on my returns. Thanks in advance for responses.:thumbsup: