A3 Apex Pro Aquarium Controller System

The A3 Apex Pro Aquarium Controller System is Neptune Systems' flagship monitoring and control solution for serious aquarists. This fully-equipped base unit features 4 FMM ports, 4 variable 0–10V outputs, 6 digital switch inputs, 2 Aquabus ports, and dedicated probe connections for pH/ORP, temperature, and salinity. The included Energy Bar 832 provides eight controllable power outlets, while lab-grade double-junction probes deliver stable readings with minimal calibration needs. The integrated Liquid Level Sensor tracks evaporation and dosing accuracy in real-time, and the LD-3 optical leak detector uses corrosion-resistant sensors ideal for saltwater environments. Connect via Wi-Fi or Ethernet to Apex Fusion—Neptune's free cloud platform—to monitor parameters, automate equipment, receive alerts, and manage your tank remotely from any device. ETL/UL certified for aquarium use with soft-touch housing and built-in audible alarm. Fully backward compatible with legacy Neptune Systems components. Power board and salinity probe sold separately.