For the 75 gal
tank I got Im thinking of trying out tis SCWD device. What would be a good external pump to use to drive the SCWD device on a 75? The total head will be around 5' and Im shooting for 500 or so GPH
at the outlet so as to not overdrive the small overflow that the tank has. Ill have a few additional PH
's in the tank moving water around aswell.