Return pump recommendations for remote sump

[daplatapus]

Yup, each DC1200 is run independent of the other. I've run 1-1/4" lines from each of them to the tank. One feeds a manifold across the front, the other across the back. Off the 1-1/4" I tee'd off a 3/4" loc line then reduced the 1-1/4" to 1". Off the 1" I tee'd off another 3/4" loc line then reduced it again to 3/4" to a final loc line. So I ended up with 3 - 3/4" loc line's across the front and 3 across the back.
The reduction of the main line keeps back pressure along the line so I get a fairly even pressure across all three loc line's. Otherwise, there would much more pressure at the end and decreasing all the way back.

These pumps are quiet, dead quiet. BUT, I can't speak to their reliability. So far, out of 3 pumps, 1 burned out its controller within a year. But to be fair it was installed incorrectly. Not enough airflow to cool the controller.
The other 2 I've only been running for a month or so. And the new controller that was supposed to fix the old one absolutely sucks for flow but they have admitted issues with my controllers via their serial numbers and they're sending new ones out. So we'll see...