Running a Reactor or Kalk Stirrer?

[texhorns98]

I currently have my ATO pulling out of a 20 gallon reservoir and into the sump. I'm using an Aqualifter pump and it seems to work quite nicely. Is there any way to tie in a reactor of some sort just outside the RO container? So it would pull the topoff RO through the media?

I've never tried any of this stuff before, so please take it easy on me if this is a crazy question!:up: