I am setting up a 75 gallon reef tank and I have 2 Aqua pump powerheads 1700 rio+ Where should the flow be directed tofor maximum water movement? also I have a Coralife super skimmer . I have in 45#of tufa rock fao a base and Am awaiting 90# of live rock. I also put in 60# of Caribsea Aragonite sand. Sound like a plan? thanks for any help in advance.