Neptune Systems - A3 Apex Pro controller

The A3 Apex Pro is the most complete and comprehensive aquarium monitoring system in the Neptune ecosphere. If you're serious about having complete control over your tank, then look no further. From key parameters like temperature and ORP to water level depth and individual equipment power monitoring, the Apex Pro does it all, and now with a new soft-touch finish and built-in audible alarm. The Apex Pro includes four FMM ports for connecting all fluid monitoring sensors-- no separate module purchase necessary!