I decided to get the Neptune ATK and use it stand alone until I got an Apex. Anytime I do a water change, fill the ato reservoir, or a couple of days go by, the ATK will fill until the float switch engages. So basically I have to monitor the thing to deal with top off daily, which is the reason why I got it, so I wouldn't have to monitor top off daily. Any ideas on how to get the stupid thing to work consistently until I get an Apex? Are the Neptune sensors that bad?