LF small external pump

[daplatapus]

Thanks guys for the ideas. I took a look at both of those pumps.
But if my math is right, I think I want something a bit bigger than that. My RO/DI and SW storage are each 30 Gallons. I was thinking in the area of filling or transferring that water volume in a minute or so. That doesn't seem too unreasonable. 30 gal in a minute = 1800 gallons an hour or 6840/litres/hr. Even the largest Eheim compact is only 5000L/Hr. And it's almost $200 at J&L. So I was thinking of seeing if anyone had a used Iwaki or Panworld I could mount to do the job.
I know, I know, maybe I'm being a bit picky about it, but I figured if I'm going to change the way I'm doing it now, I might as well go all out and do it so I never have to re-do it.