Neptune Systems A3 Apex Controller System (Starter Kit)

The Neptune Systems A3 Apex is a complete aquarium controller that monitors and automates your entire system from one app. This Starter Kit pairs the A3 Apex base unit with the Energy Bar 832 for eight controlled outlets, plus lab-grade pH and temperature probes, leak detection, and a water-level sensor, so you can watch every parameter and run equipment on schedules, ramps, and safety rules. It grows with your tank through Neptune’s expandable module system. Browse more controllers and automation.

What It Does

• Monitor pH, temperature, water level, and leaks in real time with lab-grade probes and the Magnetic Optical Sensor
• Control 8 individual outlets with the included Energy Bar 832, with energy-use tracking per outlet
• Automate lights, heaters, pumps, dosers, and top-off with schedules, ramps, and conditional rules
• Get instant alerts for leaks, temperature swings, and equipment faults, backed by a built-in audible alarm
• Manage everything remotely through the free Apex Fusion app over WiFi or Ethernet
• Expand anytime with Neptune modules and sensors over AquaBus and 1LINK

What Is Included

• A3 Apex Base Unit (built-in alarm, WiFi and Ethernet, 2 AquaBus, 1 pH, 1 temperature port)
• Energy Bar 832 (8 controlled outlets, 3 x 1LINK, 2 x 24V)
• Lab-Grade Double Junction pH Probe
• Temperature Probe
• Solid-Surface Leak Detection Probe
• Magnetic Optical Sensor (MOS) for water level
• 6 ft AquaBus Cable
• pH Calibration Solutions (pH 7 and pH 10)

Specifications

Which Apex Is Right for You?

The A3 Apex Jr (Entry Kit) is a monitoring-first starting point. This A3 Apex (Starter Kit) adds full outlet control with the Energy Bar 832. The A3 Apex Pro (Complete Kit) steps up to the most advanced, expanded setup.

Recommended Pairings

• MXM Mobius Wireless Control Module to add wireless devices
• SV-1 Solenoid Valve for automated water control
• AFS Automatic Feeding System for scheduled feeding
• More Neptune Systems modules and sensors

FAQ

Does it control my equipment? Yes. The included Energy Bar 832 gives you 8 individually controlled outlets with energy monitoring.

Do I need WiFi? WiFi or Ethernet both work. You manage everything from the free Apex Fusion app.

Can I expand it later? Yes. Add dosers, auto top-off, feeders, extra Energy Bars, and sensors over AquaBus and 1LINK.

Reef only, or freshwater too? Both. It works on saltwater, reef, and freshwater systems.