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Check out This Months Specials! 🔥 30% off Continuum 🔥 20% off Two Little Fishies 🔥 15% off Ocean Nutrition (when you buy 3 or more)
Check out This Months Specials! 🔥 30% off Continuum 🔥 20% off Two Little Fishies 🔥 15% off Ocean Nutrition (when you buy 3 or more)

Neptune Systems

Precision Monitoring & Automation for Serious Reefkeepers
Explore our full range of Neptune Systems gear—built for accuracy, control, and peace of mind. From the powerful Apex Controller and Trident water testing system to flow meters, probes, and leak detectors, Neptune’s modular components give you the tools to automate and monitor every part of your reef tank. Perfect for both new setups and long-term reef maintenance.

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    Trident - Marine Aquarium Water Analyzer

    Only 2 left!

    Neptune Systems Trident: Automated Testing for Calcium, Alkalinity, and Magnesium Overview The Trident is a fully automated testing system for salt...

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  • $139.90 - $139.90
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    Neptune 2-Month Trident Reagent Kit

    6 in stock

    Neptune Systems Trident Reagent Kit For Trident Marine Water Analyser Overview Neptune Systems' Trident Reagent Kit includes everything you need f...

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    $139.90 - $139.90
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  • $19.90 - $19.90
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    Probe Calibration Kit - ph 7.0, ph 10.0, & Salinity 53000uS

    Only 5 left!

    Neptune Systems Probe Calibration Kit Accurate Calibration for pH and Salinity Probes Overview Over time, all probes will drift—especially in reef...

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  • $99.90 - $99.90
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    MPR Magnetic Probe Rack

    Only 2 left!

    Neptune Systems MPR – Magnetic Probe Rack Secure & Organised Probe Management for Apex Systems Overview The Neptune Systems Magnetic Probe Rac...

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    $99.90 - $99.90
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    PMUP v2 Practical Multi-Purpose Utility Pump

    Only 2 left!

    Neptune Systems PMUP v2 – Multi-Purpose Utility Pump Compact, Powerful, and Versatile. Built for ATO and More. Overview The PMUP v2 (Practical Mul...

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    $99.90 - $99.90
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  • $1,599.90 - $1,599.90
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    A3 Apex Pro Aquarium Controller System

    Only 1 left!

    Power Board Sold Separately and Due End of 2025 Neptune Systems A3 Apex Pro System The Ultimate Aquarium Monitoring and Control System for the Seri...

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    $1,599.90 - $1,599.90
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  • $14.90 - $14.90
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    Neptune Systems Conductivity Calibration Solution - 53000 Microsiemens

    10 in stock

    Neptune Systems 53,000 µS Conductivity Calibration Solution – Single Use Packet Accurate Salinity Calibration for Saltwater Applications Overview ...

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    $14.90 - $14.90
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  • $79.90 - $79.90
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    Neptune Apex Temperature Probe

    Only 1 left!

    Neptune Systems Long-Life Temperature Probe Reliable Temperature Monitoring for Any Apex Module Overview This long-life temperature probe is built...

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  • $259.90 - $259.90
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    MXM Mobius Wireless Control Module

    Only 2 left!

    In stock  Neptune Systems MXM – Mobius Wireless Module All Your Devices. One Control Centre. Overview The MXM (Mobius Control Module) bridges Nept...

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  • $199.90 - $199.90
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    PM1 pH/ORP Probe Module

    Only 1 left!

    Neptune Systems PM1 – pH/ORP Probe Expansion Module Expand Your Apex Monitoring Capabilities Overview The PM1 Module is a compact, plug-and-play e...

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    $199.90 - $199.90
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  • $139.90 - $139.90
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    15 Inch LLS Liquid Level Sensor

    Only 1 left!

    Neptune Systems LLS – Liquid Level Sensor Continuous Water Level Monitoring with Precision and Control Overview The LLS (Liquid Level Sensor) by N...

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    $139.90 - $139.90
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  • $249.90 - $249.90
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    FMM Fluid Monitoring Module

    Only 1 left!

    Neptune Systems FMM – Fluid Monitoring Module Flow Monitoring. Leak Detection. Water Level Management. Overview The FMM (Fluid Monitoring Module) ...

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    $249.90 - $249.90
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  • $849.90 - $849.90
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    DOS QuietDrive Dosing Pump

    Only 2 left!

    Neptune Systems DŌS QuietDrive Dose. Automate. Protect. Overview The DŌS QuietDrive (QD) is an upgraded, ultra-quiet dosing system designed to wor...

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    $849.90 - $849.90
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  • $549.90 - $549.90
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    ATK V2 Auto Top Off Kit

    Only 2 left!

    Neptune Systems ATK – Auto Top-Off Kit A Complete, Standalone ATO Solution with Intelligent Safeguards Overview The ATK (Auto Top-Off Kit) by Nept...

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    $549.90 - $549.90
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  • $1,149.90 - $1,149.90
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    A3 Apex Aquarium Controller System

    Only 1 left!

    Power Board Sold Separately and Due 2026 Empowering Aquarists with Critical Monitoring and Precision Control Unrivalled Control and Monitoring Head...

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  • $149.90 - $149.90
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    1" Flow Sensor FS100

    Only 2 left!

    Neptune Systems FS-100 Flow Sensor – 1" Know Your Flow. Monitor High-Volume Systems with Precision. Overview The FS-100 Flow Sensor is designed fo...

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    $149.90 - $149.90
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    DOS Replacement Tubing

    Only 2 left!

    Neptune Systems DOS Replacement Tubing For DOS Dosing & Fluid Metering Systems Overview This replacement tubing is designed for use with the N...

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  • $229.90 - $229.90
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    Lab Grade Double Junction pH Probe

    Only 1 left!

    Neptune Systems Double Junction pH Probe Extended Life & Precision Monitoring for Reef Systems Overview The Double Junction pH Probe by Neptun...

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    Lab Grade Double Junction ORP Probe

    Only 1 left!

    Neptune Systems Double Junction ORP Probe Reliable, Long-Lasting ORP Monitoring for Reef Systems Overview The Double Junction ORP Probe from Neptu...

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    $229.90 - $229.90
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  • $79.90 - $79.90
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    MOS Magnetic Optical Sensor

    Only 2 left!

    Neptune Systems MOS – Magnetic Optical Sensor Modern, Compact Water Level Monitoring with Apex Integration Overview The MOS (Magnetic Optical Sens...

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    $79.90 - $79.90
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  • $499.90 - $499.90
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    DDR DOS Dual Reservoir

    Only 2 left!

    Neptune Systems DDR – DOS Dual Reservoir Smart, Stable Liquid Storage for Your Dosing System Overview The DDR (DOS Dual Reservoir) is a purpose-bu...

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  • $79.90 - $79.90
    $79.90
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    LD-2 Solid Surface Leak Detection Probe

    Only 1 left!

    Neptune Systems LD-2 Leak Detection Probe Detect Leaks Early. Prevent Costly Damage. Overview The LD-2 Leak Detection Probe is a full-size water s...

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    $79.90 - $79.90
    $79.90
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    LD-1 Low Profile Leak Detection Probe

    Only 1 left!

    Neptune Systems LD-1 Leak Detection Probe Low-Profile Design for Discreet Leak Detection Overview The LD-1 Leak Detection Probe is a low-profile s...

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    $79.90 - $79.90
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  • $679.90 - $679.90
    $679.90
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    COR-15 Intelligent Return Pump (1500 GPH)

    Only 2 left!

    Neptune Systems COR-15 Intelligent Return Pump Smart, Silent, and Fully Apex-Integrated Overview The COR-15 is an intelligent, energy-efficient re...

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    $679.90 - $679.90
    $679.90
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    $679.90

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