Neptune Systems Apex
An aquarium controller is one of the most practical upgrades you can make for keeping fish and coral safe. It acts like a 24/7 watchdog for your system, tracking critical conditions and responding fast when something drifts. Instead of discovering a heater stuck on, a pump that stopped, or a leak after the damage is done, Apex can alert you early and automate protective actions to help prevent tank crashes.
The Neptune Systems Apex ecosystem brings monitoring, alerts, and automation into one interface with Apex Fusion. Start simple, then expand into advanced stability tools like automated testing and dosing. If you want the full Apex lineup, explore Neptune Systems Controllers.
Why Do I Need an Aquarium Controller?
Protect Your Livestock
Monitor temperature, pH, water level, and other critical aquarium conditions around the clock. Receive alerts and automate responses to help prevent issues before they impact fish and corals.
Remote Monitoring & Control
Stay connected to your aquarium from anywhere using Apex Fusion. Check tank status, receive notifications, and control equipment whether you're at home or away.
Improve Aquarium Stability
Consistent conditions are essential for long-term success. Apex helps maintain stable parameters by monitoring your system continuously and notifying you when something changes.
Automate Daily Tasks
Simplify routine maintenance by automating lighting schedules, feeding modes, pumps, and other repetitive tasks to create a more consistent aquarium environment.
Prevent Equipment Failures
Identify problems like stuck heaters, failed pumps, overflowing sumps, and water leaks before they become expensive disasters.
Flexible & Expandable Platform
Start with the essentials and expand over time with leak detection, automated testing, dosing, flow monitoring, and additional modules as your reef grows.
Apex vs. Apex Pro
Both Apex systems give you powerful monitoring, alerts, automation, and cloud-based control through Apex Fusion. The standard Apex is a great fit for most reef tanks, while Apex Pro adds advanced monitoring features for hobbyists who want deeper insight into water quality and system performance.
A3 Apex Controller System
Strong monitoring and protection with the essentials to start controlling your aquarium with confidence.
- Includes Temperature + pH Probes
- Includes MOS Water Level Sensor + LD-2 Leak Sensor
- A3 Apex Base Unit With 1 pH Port + 1 Temperature Port
- Energy Bar 832 For Smart Outlet Control + Power Monitoring
A3 Apex Pro Controller System
Expanded ports and sensors for deeper visibility, finer control, and more advanced automation headroom.
- Includes Temperature + pH + ORP Probes
- Includes LLS Continuous Level Sensor + LD-3 Multi-Surface Leak Sensor
- Base Unit With 2 pH/ORP Ports + Salinity Port
- Built-In Variable Speed 0-10V Outputs For Added Control Options
| Feature | A3 Apex | A3 Apex Pro |
|---|---|---|
| Included Probes | Temperature, pH | Temperature, pH, ORP |
| Level And Leak Protection | MOS Water Level Sensor, LD-2 Leak Sensor | LLS Continuous Level Sensor, LD-3 Multi-Surface Leak Sensor |
| Probe Ports On Base Unit | 1 pH, 1 Temperature | 2 pH/ORP, 1 Temperature, 1 Salinity |
| FMM Ports | 3 | 4 |
| Variable Speed Control | Not Built In | 2 Variable Speed 0-10V Ports |
| Power Control | Energy Bar 832 Included | |
Note: Neptune Systems also offers the entry-level A3 Apex Jr. Monitoring System, which primarily focuses on monitoring critical parameters and water level.
Neptune Systems Videos
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Get real answers to your most pressing questions about the Neptune Systems Apex Aquarium ControllerRead more
Learn how to program outlets on the Neptune Systems Apex using Apex Fusion tasks. Set up heaters, lights, pumps, and skimmers with simple automation to keep your reef tank running smoothly.Read more
Get the most out of your Neptune Systems A3 Apex by properly setting up its probes and alerts. This step-by-step guide walks you through calibrating temperature, pH, and ORP probes, along with...Read more
Unlock the full power of your Neptune Systems A3 Apex by connecting it to Apex Fusion for real-time monitoring and control from anywhere. This step-by-step guide walks you through getting your...Read more
This guide is all about getting familiar with the hardware that comes with the Neptune Systems A3 Apex Pro and learning how everything connects together. We’ll walk through what’s included in the...Read more
This guide is all about getting familiar with the hardware that comes with the Neptune Systems A3 Apex and learning how everything connects together. We’ll walk through what’s included in the...Read more
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Frequently Asked Questions
What can an Apex controller do to protect a reef tank?
Apex can monitor key parameters and sensors, send alerts when something is off, and automate outlet actions to help prevent common failures from turning into livestock losses.
What is the difference between A3 Apex and A3 Apex Pro?
A3 Apex includes temperature and pH monitoring plus MOS level sensing and LD-2 leak detection. A3 Apex Pro adds ORP monitoring, an LLS continuous level sensor, an LD-3 multi-surface leak sensor, more ports on the base unit, and built-in variable speed 0-10V outputs.
Which controller should you choose for a first-time setup?
If you want high-value protection and the essentials to start automating, choose A3 Apex. If you want the most complete monitoring package with ORP, advanced level sensing, and more built-in control options, choose A3 Apex Pro.
Do these systems include power control?
Yes. Both A3 Apex and A3 Apex Pro include an Energy Bar 832, which provides smart outlet control and per-outlet monitoring to help manage equipment and respond to issues.
Can you expand an Apex system later?
Yes. The Apex ecosystem is designed to expand over time with additional modules and accessories so you can add monitoring, automation, and integrations as your tank grows.
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