Neptune Systems

A3 Apex Aquarium Controller System

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Empowering Aquarists with Critical Monitoring and Precision Control

  • Unrivaled Control and Monitoring
  • Cutting-Edge Connectivity
  • Simplified User Experience
  • Add Safety and Reliability to Your Aquarium
  • Future-Proof Expandability


Unrivaled Control and Monitoring

Headlined by the A3 Apex base unit, this system boasts unparalleled monitoring capabilities, including temperature, pH, water level, and surface leaks detection. The included Energy Bar 832 serves as a power hub, featuring eight individual outlets with independent power consumption monitoring and three 1LINK outputs for seamless integration with Neptune Systems accessories like DŌS, Trident, and WAV pumps.

The Apex Fusion App - Apex Fusion is a free cloud-based service that allows you to connect to your Apex from anywhere in the world! This user-friendly platform allows effortless monitoring of your aquarium's vital parameters. With features like drag-and-drop customization, easy-to-use task functions to set up new equipment, and real-time alerts, Apex Fusion ensures that maintaining optimal conditions in your aquarium is hassle-free and efficient.


Future-Proof Expandability

The Apex Controller System is not just a purchase; it's an investment. Backwards compatible and easily expandable. Want to add Salinity monitoring? Just connect a PM2 module and Conductivity Probe. How about automatic testing of your tank's Calcium, Alkalinity, and Magnesium levels? The Trident is what you want. With dozens of optional add-on devices and modules, you can build your Apex system for your exact needs.


What Do I get with the A3 Apex?

A3 Base Unit: The Apex A3 Base Unit serves as the brain of the system. With its array of ports, including three FMM ports for fluid monitoring sensors, two Aquabus ports for connecting accessories and modules, and dedicated ports for pH and temperature probes, the A3 Base Unit offers unparalleled versatility and expandability.

Temperature ProbeIf the temperature falls outside of the specified safe zone, you'll receive a notification so that you can correct the issue. Crucial for detecting malfunctioning heaters early, allowing you to fix the problem before it's too late.

pH ProbeKnowing your aquarium's pH is helpful in a number of ways, but particularly useful if you're dosing two-part or kalkwasser to your aquarium. For example, the pH probe might help you detect a potential overdose due to a stuck dosing pump.

Magnetic Optical Sensor (MOS)This low-profile level sensor can be used for a number of purposes such as a high or low level warning in your sump or dosing container. It can be mounted on any type of material up to 1/4" thick. 

LD-2 Leak Detection SensorProtect your floors by placing this sensor inside your aquarium stand or any other flat surface where an overflow may cause issues. If water ever touches the sensor, your A3 Apex can notify you so you can take action.

EB832: The Energy Bar 832 has 8 standard plugs, 3 1LINK ports, 2 24VDC outputs, and 3 AquaBus ports. Having the EB832 connected to your Apex allows you to control your equipment remotely. You can even set up custom controls to turn certain outlets on/off if one of the other parameters falls outside of your safe zone. For example, if your tank's temperature is rising too high, you can have your Apex automatically turn on a cooling fan or cut power to a potentially malfunctioning heater. The possibilities are endless!




Head Unit Dimensions: 4.75" L x 5.25" H x 3.25" W

Energy Bar 832 Dimensions: 10" L x 6.5" H x 2.25" W

Connection Type: WiFi or Ethernet


A3 Apex Bundle Includes:

A3 Apex Base Unit

EB832 Energy Bar 832

Temperature Probe

pH Probe

MOS Magnetic Optical Sensor

LD-2 Leak Detection Sensor

6' Aquabus Cable

Calibration Solutions (7 & 10)

Mounting Screws

Getting Started Card

More Information
UPC 653078004915
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Product Questions

Can you connect a salinity probe to this controller?
Question by: mike on Jan 10, 2024, 11:20 AM
Hey there,
Thank you for reaching out to us. Yes. Please let me know if you need anything further.
Answer by: Thomas Wofle (BRS Staff) on Feb 8, 2024, 9:25 AM
Will this run a float switch for the auto top for fresh water and turn the pump on and off
Question by: Timothy Seippel on Nov 3, 2022, 7:22 PM
Answer by: Scott F. (BRS Staff) on Nov 9, 2022, 12:09 PM
What is the maximum number of modules that this controller will support?
Question by: Tom Wilson on Aug 11, 2022, 1:45 PM
Hey there,
Thank you for reaching out to us. It can have 240 Modules.

Please let me know if you need anything further and take care!
Answer by: Matt Lucero (BRS Staff) on Aug 12, 2022, 2:04 PM