auto water change

Looking to add two separate ATOs into one collective. Each would need to be on a schedule. One running while the store is open/ actively selling out of the tanks. This would replenish saltwater back into the system. And the second while the store is closed and would replace evaporated water...

Is there a way to schedule water changes with non hydros controller to shut down return Pump, heater etc and run on a specific schedule in the app? I see a water change mode but don't know how to take advantage. I also ha e a wifi Feeder and see a feeding mode and don't know how this ties in...