I'm currently working on my 210gal RR setup and needed help with what size of Return pumps should i use...

the tank dimensions are 72Lx24Wx29H...tank is pre-drilled with (two) 1inch Drain lines and (two) 3/4 inch for return lines

pumps will be located in the sump which will probably be a total of 5.4ft below the tank and be using 3/4 inch pvc pipes for the returns