need help with kalk reactor

[derm]

hey whats up everyone, just wondering if anyone is using a kalk reactor and how exactly they have it hooked up. i have a my reef creations kalk reactor but not sure witch way i should hook it up , i know the basics but i just want to see how everyone else is doing it , i dont want to hook it up through my topp off but not sure how to get it to work with my topp off now, i have a spectra pure 2000 with a float switch and a electronic air switch , this way if the float switch fails the air switch shuts down my rodi unit. anyhelp would be much appreciated thanks a lot derm