hello i have a profilux II ex. i am trying to achieve a water change without using the ato feature as my R/O unit is taking care of this. now i have read the sticky at the top of 'Measuring and controlling" and don't really understand it.

All i want to do is have a pump come on for an x amount of time to drain water from my sump and another pump which is in my saltwater reservoir to pump water back in for an x amount of time!! (if i don't have to use the float switches respectively) now i do have two float sensors which i was told i needed for the water change but after messing around a little i'm beginning to think i now don't need them. can anyone help with the programming of this situation?