that's very odd. Apex does have its issues sometimes for sure. My entire tank runs off it reliably but it does have some funky issues like that.Pump failed to kick on, after phone support with Neptune they created a couple virtual outlets to watch the performance and it worked fine for a month or two then it did it again. If I have to set up a support ticket every other month or so it’s not worth it to me. Nothing against Neptune system my whole system is run by it and my experience with support has been good.