Neptune Systems A3 Apex Pro Aquarium Controller System
Neptune Systems A3 Apex Pro
Monitor. Protect. Automate.
The A3 Apex Pro is a complete aquarium monitoring and control system built to help prevent equipment failures, catch problems early, and make day-to-day reefing less stressful. Track key parameters, control connected devices, and get notified when something needs attention.
Monitoring
Track temperature, pH, and ORP with included lab-grade probes
Continuous water level monitoring and leak detection with LLS and LD-3 sensors
View trends and history inside the Apex Fusion dashboard
Protection & Alerts
Automatically turn outlets on or off based on water parameters, sensors, or even time/day of the week
Email and/or push notifications when something needs your attention
Built-in audible alarm for immediate local alerts
Control & Expansion
Control Neptune Systems equipment like DOS and COR pumps, Trident testers, and more
Also compatible with select non-Neptune equipment from top brands like EcoTech Marine, AquaIllumination, Sicce, and Kessil
Backwards compatible with legacy Apex modules
Inside the A3 Apex Pro
A3 Apex Pro Base Unit+
The brains of the operation with the most complete monitoring and control experience in the Apex ecosystem.
4 FMM ports
2 variable speed 0-10V ports (2 channels each)
I/O port - 6 switch digital inputs
2 AquaBus ports
2 pH/ORP probe ports, 1 temperature probe port, 1 salinity probe port*
WiFi and Ethernet compatible
Soft-touch finish and built-in audible alarm
*Salinity probe sold separately.
Energy Bar 832+
Purpose-built aquarium power control with per-outlet power monitoring, expansion ports, and accessory outputs.
ETL/UL certified specifically for aquarium use
8x 120VAC outlets
Per-outlet power monitoring (watts/amps) with outlet status indicators
3x 1LINK outputs for WAV, DOS, and more
2x DC24V outputs for accessories (PMUP, solenoids, fans)
3x AquaBus ports for expansion
Liquid Level Sensor (LLS)+
A continuous sensor that reads the exact depth of liquid in inches or centimeters.
Continuous depth measurement rather than simple on/off detection
Use in sumps, ATO reservoirs, AIO tanks, dosing containers, mixing stations
Set alerts or actions when level changes by a specified amount
Digital and visual readouts in the Fusion app
LD-3 Optical Multi-Surface Leak Sensor+
A reliable optical leak detector that works on nearly any surface.
Reusable and resistant to corrosion after saltwater contact
Works on multi-surface placements (including metal) without false alarms
Reliable early warning to help prevent damage to your aquarium or home
Three High-Quality Probes Included+
Monitor temperature, pH, and ORP right out of the box.
Includes temperature, pH, and ORP probes
Double-junction pH/ORP probes help maintain stable readings
Easy, guided calibration steps in Apex Fusion.
Salinity probe also available (sold separately)
Upgrades & Add-Ons+
The Apex ecosystem is designed to grow with your tank. Start with monitoring and control, then add Neptune accessories over time to build a system that matches your goals.
For Example:
Add automated testing with the Trident ACM or Trident NP
Set up automated dosing or water changes with the DOS QuietDrive
Add Additional modules and energy bars to support multiple aquariums with one Apex
Backwards Compatible+
If you already own Apex modules, energy bars, or other compatible accessories, they can work with the A3 Apex controllers.
Compatible with both existing and legacy Apex modules and accessories
Apex Fusion Interface+
Apex Fusion is a web-based command center for monitoring, alerts, and automation. Customize the dashboard with drag-and-drop tiles and check in from nearly any device.
Set reminders, log testing and dosing information, and keep tabs on your aquarium from anywhere.
Web-based interface with dashboards, graphs, and tiles
Alerts help you respond to small issues before they become big problems
Apex Fusion app is compatible with iOS and Android devices
Featured Video
Specifications
A3 Apex Pro Base Unit
FMM Ports40–10V Outputs4 ChannelsSwitch Inputs6AquaBus Ports2Probe Ports2 pH/ORP, 1 Temperature, 1 Salinity*NetworkingWiFi & EthernetAlarmBuilt-In Audible AlarmDimensions4.75" L x 3.25" W x 5.25" W
*Salinity probe sold separately.
Energy Bar 832
120VAC Outlets81LINK Ports3DC24V Accessory Ports2AquaBus Ports3CertificationETL/UL Certified For Aquarium UseDimensions10" L x 2.25" W x 6.5" H
What’s Included
A3 Apex Pro Base UnitMain brain of the controller for monitoring, automation, and alerts
Energy Bar 832Smart control with power monitoring for each outlet
LD-3 Leak Detection SensorReusable optical leak detection sensor for almost any surface
Liquid Level Sensor (LLS)Continuous water level depth monitoring in inches or centimeters
Temperature ProbeTrack temperature trends and control connected heating or cooling devices
pH ProbeLab-grade double-junction probe for reliable pH readings
ORP ProbeORP probe to monitor your system's ability to break down waste
Also Included
6' AquaBus Cable
pH Calibration Solutions (7 & 10)
Mounting Screws
Getting Started Card
Neptune Systems A3 Apex Pro
Monitor. Protect. Automate.
The A3 Apex Pro is a complete aquarium monitoring and control system built to help prevent equipment failures, catch problems early, and make day-to-day reefing less stressful. Track key parameters, control connected devices, and get notified when something needs attention.
Monitoring
Track temperature, pH, and ORP with included lab-grade probes
Continuous water level monitoring and leak detection with LLS and LD-3 sensors
View trends and history inside the Apex Fusion dashboard
Protection & Alerts
Automatically turn outlets on or off based on water parameters, sensors, or even time/day of the week
Email and/or push notifications when something needs your attention
Built-in audible alarm for immediate local alerts
Control & Expansion
Control Neptune Systems equipment like DOS and COR pumps, Trident testers, and more
Also compatible with select non-Neptune equipment from top brands like EcoTech Marine, AquaIllumination, Sicce, and Kessil
Backwards compatible with legacy Apex modules
Inside the A3 Apex Pro
A3 Apex Pro Base Unit+
The brains of the operation with the most complete monitoring and control experience in the Apex ecosystem.
4 FMM ports
2 variable speed 0-10V ports (2 channels each)
I/O port - 6 switch digital inputs
2 AquaBus ports
2 pH/ORP probe ports, 1 temperature probe port, 1 salinity probe port*
WiFi and Ethernet compatible
Soft-touch finish and built-in audible alarm
*Salinity probe sold separately.
Energy Bar 832+
Purpose-built aquarium power control with per-outlet power monitoring, expansion ports, and accessory outputs.
ETL/UL certified specifically for aquarium use
8x 120VAC outlets
Per-outlet power monitoring (watts/amps) with outlet status indicators
3x 1LINK outputs for WAV, DOS, and more
2x DC24V outputs for accessories (PMUP, solenoids, fans)
3x AquaBus ports for expansion
Liquid Level Sensor (LLS)+
A continuous sensor that reads the exact depth of liquid in inches or centimeters.
Continuous depth measurement rather than simple on/off detection
Use in sumps, ATO reservoirs, AIO tanks, dosing containers, mixing stations
Set alerts or actions when level changes by a specified amount
Digital and visual readouts in the Fusion app
LD-3 Optical Multi-Surface Leak Sensor+
A reliable optical leak detector that works on nearly any surface.
Reusable and resistant to corrosion after saltwater contact
Works on multi-surface placements (including metal) without false alarms
Reliable early warning to help prevent damage to your aquarium or home
Three High-Quality Probes Included+
Monitor temperature, pH, and ORP right out of the box.
Includes temperature, pH, and ORP probes
Double-junction pH/ORP probes help maintain stable readings
Easy, guided calibration steps in Apex Fusion.
Salinity probe also available (sold separately)
Upgrades & Add-Ons+
The Apex ecosystem is designed to grow with your tank. Start with monitoring and control, then add Neptune accessories over time to build a system that matches your goals.
For Example:
Add automated testing with the Trident ACM or Trident NP
Set up automated dosing or water changes with the DOS QuietDrive
Add Additional modules and energy bars to support multiple aquariums with one Apex
Backwards Compatible+
If you already own Apex modules, energy bars, or other compatible accessories, they can work with the A3 Apex controllers.
Compatible with both existing and legacy Apex modules and accessories
Apex Fusion Interface+
Apex Fusion is a web-based command center for monitoring, alerts, and automation. Customize the dashboard with drag-and-drop tiles and check in from nearly any device.
Set reminders, log testing and dosing information, and keep tabs on your aquarium from anywhere.
Web-based interface with dashboards, graphs, and tiles
Alerts help you respond to small issues before they become big problems
Apex Fusion app is compatible with iOS and Android devices
Featured Video
Specifications
A3 Apex Pro Base Unit
FMM Ports40–10V Outputs4 ChannelsSwitch Inputs6AquaBus Ports2Probe Ports2 pH/ORP, 1 Temperature, 1 Salinity*NetworkingWiFi & EthernetAlarmBuilt-In Audible AlarmDimensions4.75" L x 3.25" W x 5.25" W
*Salinity probe sold separately.
Energy Bar 832
120VAC Outlets81LINK Ports3DC24V Accessory Ports2AquaBus Ports3CertificationETL/UL Certified For Aquarium UseDimensions10" L x 2.25" W x 6.5" H
What’s Included
A3 Apex Pro Base UnitMain brain of the controller for monitoring, automation, and alerts
Energy Bar 832Smart control with power monitoring for each outlet
LD-3 Leak Detection SensorReusable optical leak detection sensor for almost any surface
Liquid Level Sensor (LLS)Continuous water level depth monitoring in inches or centimeters
Temperature ProbeTrack temperature trends and control connected heating or cooling devices
pH ProbeLab-grade double-junction probe for reliable pH readings
ORP ProbeORP probe to monitor your system's ability to break down waste
Also Included
6' AquaBus Cable
pH Calibration Solutions (7 & 10)
Mounting Screws
Getting Started Card