How can I tell if this thing is working? My set-up:
Run the pump on low 24hrs.
Set the Aquatrol@30% output. It seems to "cycle" on for awhile (I can see the bubble coming out of the return), and then cycles off ( no bubbles). I haven't actually seen it cycle back on. Is this normal? When you dial the percantage lower than 100, does it cycle on and off?