I am planning a 72"Lx 30"Wx24"H FOWLR tank. But, I want to plan for eventually going reef. There will probably be a 1/2"-1" sand bed. I am looking for input as to how appropriate it would be to just put a 6060 on each end of the tank(2 6060's) pointed toward each other. I would likely have a sump which would return 4x hrly to start and in the future another 4x for a total 8x turnover hrly. What would be the impact of sand movement? Would this be too caotic or just right? Would it really matter if I didn't get the controller and just let the Tunzes go 24 hrs a day with the exception of feeding time? Thank you for your advice!