Neptune Systems

(66 items)

Take control of your reef tank with Neptune Systems — the industry leader in smart aquarium automation. From the iconic Apex Controller to the innovative Trident water analyzer, Neptune’s ecosystem of devices is designed to simplify tank management, enhance stability, and protect your livestock. Whether you're automating lighting, dosing, or water changes, Neptune Systems gives you full visibility and remote access through the Apex Fusion platform.

At Top Shelf Aquatics, we carry the full line of Neptune Systems products, including modules, sensors, and add-ons that let you build a custom setup tailored to your reef’s needs. Trusted by hobbyists and professionals alike, Neptune delivers precision, reliability, and peace of mind.


Neptune Systems Top Picks

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A3 Apex Controller System - Neptune Systems
A3 Apex Controller System - Neptune Systems
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A3 Apex Pro Controller System - Neptune Systems
A3 Apex Pro Controller System - Neptune Systems
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Trident - Marine Aquarium Water Analyzer - Neptune Systems
Trident - Marine Aquarium Water Analyzer - Neptune Systems
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DOS QD Dosing and Fluid Metering System - Neptune Systems
DOS QD Dosing and Fluid Metering System - Neptune Systems
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Price
Price
$62999
$94599
$67499
$34999
Features
Features
The A3 Apex is the perfect entry point for serious tank automation. It includes key sensors and full control capabilities through the Energy Bar 832 and Apex Fusion app. Monitor temperature, pH, water level, and detect leaks—all with expandable compatibility across Neptune's ecosystem. It’s WiFi and Ethernet-ready and features a built-in alarm, making it a reliable controller for any reefer looking to gain peace of mind and prevent tank disasters.

Key Features:
- Tracks: Temperature, pH, water level, and surface leaks
- Includes: EB832 (8 outlets, 3x 1LINK, 2x 24V), MOS sensor, LD-2 sensor
- App Control: Apex Fusion with customizable dashboard and alerts
- Expandable: Supports additional probes, modules (PM2, PM3, DOS, WAV, etc.)
- Coverage: Control up to 13 total devices
- Probes: Lab-grade temp & double-junction pH
- Power: 120V via Energy Bar 832
- Connectivity: WiFi + Ethernet
The A3 Apex Pro is Neptune’s most advanced aquarium control system, offering full-spectrum monitoring and automation. It features additional probe ports for ORP and salinity (sold separately), a vertical Liquid Level Sensor for real-time water depth tracking, and a reusable LD-3 optical leak sensor. Whether you're managing a complex reef system or demand top-tier control and fail-safes, the Apex Pro is built for total system insight and control.

Key Features:
- Tracks: Temp, pH, ORP, water depth (LLS), multi-surface leaks (LD-3)
- Includes: EB832 (8 outlets, 3x 1LINK, 2x 24V), LLS, LD-3 sensor
- App Control: Apex Fusion cloud access with digital/visual readouts
- Expandable: Dual pH/ORP ports, salinity (via PM2), and 0–10V control
- Probes: Lab-grade temp, pH, and ORP (double-junction)
- Power: 120V via Energy Bar 832
- Connectivity: WiFi + Ethernet
The Neptune Trident offers fast and accurate water testing for alkalinity, calcium, and magnesium in your reef tank. From unboxing to testing in under 15 minutes, it requires no complicated setup — just plug in, connect to the Apex Fusion app, and let the videos guide you. Its precision (+/- 0.05 dKh for Alkalinity, 15ppm for Calcium and Magnesium) surpasses manual test kits, giving you reliable data.

- Simple Setup: From the box to testing in under 15 minutes, no calibration needed.
- High Precision: Accurate to +/- 0.05 dKh for alkalinity, 15ppm for calcium and magnesium.
- Automated Dosing Control: Paired with Neptune DŌS, it auto-adjusts dosing for stability.
- Easy Reagent Changes: Monthly reagent changes with a two-month supply kit.
- Quiet Operation: Ultra-quiet testing, easily integrates with your cabinet setup.
- Compact Design: Dimensions: 4.25" x 12" x 10"; uses only 8mL of sample water per test.

Specifications:

- Dimensions: 4.25” x 12” x 10”
- Testing Time: 7 minutes per test
- Water Use: 8mL per test
- Includes: Trident System, 1Link Cable, Sample and Waste Tubing, 2-Month Reagent Supply

Requires Neptune Apex system.
The DŌS QuietDrive from Neptune Systems combines the reliable performance of the original DŌS with enhanced QuietDrive technology, offering a quieter, more versatile dosing solution. Designed for seamless integration with A2 and A3 Series Apex Controllers, this dosing system is perfect for maintaining precise water chemistry and automating water changes in your aquarium. With its dual pump heads, easy maintenance, and robust capabilities, the DŌS QuietDrive makes aquarium care more efficient and less hands-on.

Enhanced QuietDrive Technology: Up to 400% noise reduction for quieter dosing operations.
Continuous Duty Modes: Operates continuously at speeds up to 60ml/min, ideal for water changes and additive dosing.
Seamless Apex Integration: Includes 1LINK cable for direct connection to the EB832 Power Bar, eliminating the need for a separate power supply.
Precision Dosing: Microdoses as low as 0.1ml for precise control over water chemistry.
User-Friendly Design: Easy-to-change pump heads and water-resistant backlit priming buttons.

Specifications:
Dimensions: 9.5" x 5" x 5"
Flow Rate: 0.1ml - 250ml/min
Max. Lift and Suction Height: 24 feet

Dive Deeper: Info & Tips for Neptune Systems

Optimizing Neptune Systems Performance:

System Integration & Control:
The true strength of Neptune Systems lies in its modular, connected ecosystem. Combine the Apex Controller with the Trident, DOS, and AFS to monitor, dose, and feed your reef — all from the Apex Fusion dashboard. Automation reduces manual tasks and improves overall tank stability.


Trident + DOS Synergy:
When paired together, the Trident and DOS form a closed-loop system that tests and adjusts water chemistry throughout the day. Once parameter targets are set, DOS automatically increases or decreases additive volumes based on real-time test results — minimizing manual adjustments.


Power Monitoring with Energy Bar 832:
Keep a close eye on power consumption for each device connected to your system. The EB832 not only allows outlet-by-outlet control, but also provides insights into equipment behavior — helping you spot failing heaters, stuck pumps, or unexpected power surges before they become serious problems.


Expert Tips

Creating Safe Automation Rules

Neptune Apex allows you to set up fallback states and conditional logic to prevent equipment from running under unsafe conditions. For example, you can program your heater to turn off if temperature exceeds a threshold or disable auto-feeding if pH drops below a safe range. These safety nets are crucial for long-term reef stability.


Calibrating Your Probes Regularly

Ensure pH and salinity probes remain accurate by calibrating them every 4–6 weeks. Use Neptune's calibration solutions and follow in-app prompts. This is especially important for tanks that rely on automated dosing based on probe readings.


Using Virtual Outlets for Custom Logic

Advanced users can take advantage of virtual outlets to create complex logic rules — like syncing light schedules with feeding windows or pausing equipment during maintenance. Virtual outlets offer a powerful way to streamline multi-device setups without extra hardware.


Optimizing Apex Fusion Dashboard

Customize your Fusion dashboard with modules you use most — such as live temp graphs, dosing logs, or current PAR readings via PMK. A well-organized dashboard makes monitoring your tank at a glance far easier, especially when away from home.


Installation & Maintenance

Setting Up Your Neptune Systems Gear

Apex Controller:
Mount the Apex base unit in a dry, easily accessible area near your aquarium. Use Neptune’s probe holders to secure pH, temperature, and salinity probes in the sump or display tank. Connect equipment like heaters, lights, and return pumps to the Energy Bar 832 for smart control and power monitoring. Make sure all AquaBus and 1LINK cables are neatly routed to avoid tangling and water exposure.


Trident Water Analyzer:
Install the Trident in a stable, level location and connect it to the Apex via AquaBus. Use the included tubing to draw water from the sump and drain waste into a collection container. Ensure reagent bottles are secure and labeled for easy monitoring. Prime the system and perform the initial calibration to begin automated testing.


DOS Dosing System:
Mount the DOS near the Trident or dosing containers. Secure dosing lines with Neptune’s tube holders or magnetic clips to prevent kinks or dislodgement. Use Apex Fusion to set up your dosing schedule or enable auto-dosing when paired with Trident readings.


AFS Auto Feeder:
Clip the AFS to the rim of your tank or sump with the included bracket. Keep it above waterline to avoid moisture buildup in the feed drum. Apex Fusion allows you to trigger feedings manually or schedule them to run during times of low flow.


Energy Bar 832:
Use included mounting brackets and ensure that high-power devices like heaters or return pumps are on separate outlets to avoid overload. Label each outlet in Apex Fusion for easy identification and control.


Routine Maintenance for Neptune Systems Devices

  • Clean probes (pH, salinity, temp) every 4–8 weeks to maintain accuracy. Use a soft brush and RO/DI water for debris and film removal.
  • Check tubing connections on DOS and Trident monthly for leaks, clogs, or buildup. Replace lines if you notice any signs of wear.
  • Replace Trident reagents as prompted by Apex Fusion notifications to avoid test interruptions. Store backup reagent kits for continuous operation.
  • Inspect Energy Bar 832 for salt creep and dust. Wipe clean with a dry cloth and ensure fans and vents remain unobstructed.
  • Update firmware via Apex Fusion regularly to access new features, improvements, and bug fixes.

Neptune Systems Controllers FAQs

What does the Neptune Apex do?

The Apex monitors and automates critical aquarium functions like temperature, pH, salinity, lighting, feeding, and more. It provides real-time alerts and remote access through the Apex Fusion app, helping prevent equipment failure and water parameter swings.

Is the Trident necessary if I already test manually?

While manual testing works, the Trident automates calcium, alkalinity, and magnesium testing up to four times a day. It improves consistency, reduces effort, and integrates with Apex to automatically adjust dosing via the DOS. Plus it can easily track trends within your aquariums parameters, to better know when to increase or decreasing dosing

Do I need an Apex to use other Neptune products?

Yes — most Neptune Systems devices (like Trident, DOS, PMK, and AFS) require an Apex base unit for full functionality and integration. The Apex acts as the central hub for all Neptune gear.

How often should I calibrate Apex probes?

It’s recommended to calibrate pH and salinity probes every 4–6 weeks using Neptune’s calibration solutions. Regular calibration ensures accurate readings for monitoring and automation.

Can I automate dosing with Neptune Systems?

Yes. Pairing the Trident with the DOS allows for automated, real-time dosing adjustments based on water testing. This creates a closed-loop system that helps maintain stable reef chemistry with minimal manual input.