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Overview Protect your aquarium and home from costly water damage with the Neptune Systems LD-1 Leak Detection Probe. Designed for use with the Advanced Leak Detection (ALD) Module, this low-profile sensor can be discreetly placed under carpet, inside a stand, or around your tank to provide early warnings of leaks or overflows. When paired with your Apex system, it enables immediate alerts so you can act before a small leak turns into a major disaster. Key Features Low-Profile Design – Easily slips under carpet or hides away for discreet placement. Strategic Leak Detection – Place around your sump, stand, or tank for early warnings. Seamless ALD Integration – Connects directly to the ALD module via RJ11 connection. Peace of Mind – Alerts your Apex system of water presence to prevent damage. Flexible Placement – Perfect for under flooring, tight spaces, or high-risk equipment areas. Product Specifications Model: LD-1 Leak Detection Probe Connection Type: RJ11 (plugs directly into ALD module) Compatibility: Neptune Systems Advanced Leak Detection (ALD) Module Design: Low-profile for discreet placement under carpet or tight areas What’s Included (1) Neptune Systems LD-1 Leak Detection Probe

Overview The Neptune Systems I/O Breakout Box expands the monitoring and automation capabilities of your Apex Controller by allowing you to connect up to six external switches. From float switches and leak detectors to push buttons and magnetic switches, the Breakout Box opens the door to endless customization and control over your aquarium environment. Key Features Seamless Apex Integration – Works with any Apex Controller system via an open I/O port. Six External Inputs – Connect float switches, push buttons, leak detectors, magnetic switches, and more. Custom Automation – Automate ATO, water changes, safety alerts, feeding routines, or even equipment security. Plug-and-Play Setup – Simple installation with any Apex Controller or expansion module that has an I/O port. Endless Possibilities – Use with open/closed devices for highly personalized control. Practical Applications Water Level Control – Automate top-offs and water changes with float switches. Leak Detection – Connect leak sensors to detect water on the floor or sump overflows. Environmental Monitoring – Use humidity sensors to control fans or dehumidifiers. Custom Feeding & Maintenance – Add push buttons to trigger feed or cleaning modes. Intrusion Alerts – Install magnetic switches on cabinets or covers for security monitoring. Product Specifications Model: I/O Breakout Box Inputs: 6 external switch inputs Compatibility: All Neptune Apex Controllers (requires a module with I/O port for Apex Jr.) Connection Type: Standard I/O port What’s Included (1) Neptune Systems I/O Breakout Box

Overview The Neptune Systems DC24 Extension Cable extends the reach of your DC24 accessories, giving you more flexibility when positioning pumps, solenoids, or other powered devices. Designed for use with the 1LINK Module and Energy Bar 832, this cable allows you to place your equipment exactly where you need it—without rearranging your reservoir or power module. Key Features Extended Reach – Adds 10 ft of length to your Neptune DC24 accessory connection. Compatible Devices – Works with PMUP utility pumps, solenoid valves, and other DC24-powered accessories. Durable & Reliable – Built with secure male-to-female connectors for long-term performance. Easy Installation – Plug-and-play design for quick setup. Flexible Placement – Ideal for ATO reservoirs or remote-mounted accessories. Product Specifications Cable Type: DC24 Extension Cable Length: 10 ft Connections: Male-to-Female Compatibility: Neptune Systems 1LINK Module & Energy Bar 832 (DC24 accessories) What’s Included (1) Neptune Systems DC24 Extension Cable – 10 ft

Overview The Neptune Systems FMM & DOS Power Supply is a genuine replacement adapter designed to power your Neptune accessories. Rated at 24VDC, 36W, this power supply enables the FMM (Fluid Monitoring Module) to run powered accessories like the PMUP or Solenoid Valve, and it also works directly with the DOS Fluid Metering System. Reliable and easy to install, it’s the perfect replacement or spare to keep your Neptune system running smoothly. Key Features Direct Replacement – Official Neptune Systems power supply. Multi-Device Compatibility – Works with the FMM, PMUP, Solenoid Valve, and DOS Fluid Metering System. Stable Power Delivery – Provides 24VDC, 36W output for safe and efficient operation. USA Standard Plug – Designed for 110V USA-style outlets. Reliable Backup – Ideal as a replacement or spare for added peace of mind. Product Specifications Input: 110V (USA outlets) Output: 24VDC, 36W Compatibility: Neptune FMM, PMUP, Solenoid Valve, DOS Fluid Metering System What’s Included (1) Neptune Systems FMM & DOS 24VDC Power Supply

Overview The Neptune Systems PMUP Power Supply is a practical accessory that lets you run your PMUP (Practical Multi-purpose Utility Pump) without needing an Apex Controller’s 24V port. Perfect for standalone use, this adapter also powers other Neptune DC24V accessories, including the SV-1. Whether you want to connect your PMUP to a timer, another controller, or operate it manually, this power supply provides the flexibility you need. Key Features Standalone Power Option – Run the PMUP without an Apex Controller. Multi-Device Compatibility – Works with Neptune PMUP and SV-1, as well as other DC24V accessories. Direct Replacement – Official Neptune Systems power supply. Flexible Control – Use with external controllers, timers, or manual operation. Reliable Power Delivery – Provides steady output for safe and efficient operation. Product Specifications Cord Length: 6 ft. Power Output: 24VDC @ 1.5A Input: 120V outlet only Compatibility: Neptune PMUP, SV-1, and other DC24V accessories What’s Included (1) Neptune Systems PMUP Power Supply

Overview The Neptune Systems 12V Power Supply is a critical yet often overlooked accessory for Apex Controllers. By supplying backup power to the head unit, this adapter allows your Apex system to continue monitoring, sending alerts, and controlling key equipment during a power outage. When paired with a UPS (Uninterruptible Power Supply), the 12V adapter ensures your aquarium stays protected, even in emergencies. Key Features Backup Power for Apex – Keeps your controller running during outages for continued monitoring and notifications. Protects Your Aquarium – Ensures critical alerts are sent when power is lost, giving you time to react. UPS Compatibility – Connect to a UPS along with your modem/router for full emergency communication capability. Life Support Control – Maintains operation of low-power devices like pumps and heaters when used with an Energy Bar on a UPS. Convenient Setup – Includes a 6 ft. power cord for flexible placement. Product Specifications Input: 12V DC (from UPS or wall power) Cord Length: 6 ft. Compatibility: Neptune Systems Apex Controllers (head units) Application: Backup power and monitoring during outages What’s Included (1) Neptune Systems 12V Power Supply with 6 ft. power cord

Overview The Neptune Systems 1LINK Power Supply is a genuine replacement part designed for reliable operation of your Apex accessories. Whether you’ve lost, damaged, or simply want a spare power supply, this unit ensures your 1LINK-enabled devices continue running smoothly. Compatible with the 1LINK Module, COR-15, and COR-20 Return Pumps, it delivers consistent power for dependable performance. Key Features Direct Replacement – Official Neptune Systems power supply for 1LINK-enabled devices. Wide Compatibility – Works with the 1LINK Module, COR-15, and COR-20 Return Pumps. Reliable Power Delivery – Provides stable 24V output to keep your equipment running. Spare or Replacement – Perfect as a backup power supply for peace of mind. Plug & Play – Easy to install and use with your existing Neptune gear. Product Specifications Input: 100–240V ~ 2.5A Output: 24V 5A Compatibility: 1LINK Module, COR-15, COR-20 Return Pumps What’s Included (1) Neptune Systems 1LINK Power Supply

Overview The Neptune Systems 447 µS Conductivity Calibration Solution is specifically formulated for calibrating conductivity probes used in freshwater applications, including RO/DI water quality monitoring. Accurate probe calibration ensures reliable readings, allowing you to maintain the highest water quality for your aquarium system. Key Features Freshwater Calibration Standard – Ideal for RO/DI water quality and freshwater aquariums. Accurate & Reliable – Provides a precise 447 µS reference point for conductivity probes. Easy to Use – Pre-measured solution makes calibration simple and consistent. Universal Compatibility – Designed for Neptune Systems probes and PM2 module but works with most conductivity probes. Routine Maintenance – Recommended calibration every 3–6 months for consistent results. Product Specifications Solution Type: 447 µS conductivity calibration solution Application: Freshwater and RO/DI water monitoring Form: Single-use packet (pre-measured) Compatibility: Neptune Systems conductivity probes & PM2 module What’s Included (1) 447 µS Conductivity Calibration Solution Packet

Overview Ensure accurate and reliable conductivity measurements with Neptune Systems Calibration Solutions. Whether monitoring RODI water quality, freshwater systems, or reef tank salinity, proper probe calibration is essential. These single-use solutions are designed to work with Neptune Systems Conductivity Probes and PM2 modules, providing precise calibration standards for both freshwater and saltwater applications. Key Features Accurate Calibration – Ensures reliable conductivity and salinity readings. Multiple Applications – Suitable for RODI water, freshwater aquariums, and saltwater reef tanks. Easy to Use – Single-use solution packets make calibration simple and precise. Universal Compatibility – Designed for Neptune Systems probes but works with most conductivity probes. Routine Maintenance – Recommended calibration every 3–6 months. Calibration Options 3000 µS Conductivity Solution – For general conductivity probe calibration (RODI/saltwater monitoring). 447 µS Conductivity Solution – For freshwater applications. 53000 µS Conductivity Solution – For saltwater applications (approx. 35ppt salinity). Product Specifications Form: Single-use calibration solution Compatibility: Neptune Systems Conductivity Probes & PM2 Module Frequency: Calibrate every 3–6 months for best results What’s Included (1) Conductivity Calibration Solution Packet (choose 3000 µS, 447 µS, or 53000 µS)

Overview Keep your Neptune Systems pH probe accurate and dependable with the 10.00 pH Single-Use Calibration Packet. Over time, probes naturally drift, but with regular calibration you can restore precision and ensure reliable readings of your aquarium’s water chemistry. This convenient packet is pre-measured and ready to use—just tear it open and place your probe directly into the solution. Key Features Single-Use Convenience – Pre-measured solution eliminates guesswork and mess. High Point Calibration – Ideal for use as the high reference (10.0) in a two-point calibration setup. Accurate & Reliable – Ensures correct probe performance and consistent monitoring. Universal Compatibility – Suitable for Neptune Apex systems and most other controllers. Routine Maintenance – Recommended every 3 months for standard probes and up to 6 months for double junction probes. Product Specifications Solution Type: 10.00 pH calibration solution Form: Single-use, tear-open packet Application: pH probe calibration for aquariums and monitoring devices What’s Included (1) 10.00 pH Single-Use Calibration Packet

Overview Protect your aquarium and home from costly water damage with the Neptune Systems Leak Detection Kit (LDK). Designed for seamless integration with your Apex Controller, the LDK includes everything you need to start monitoring for leaks within minutes. With two included leak detection probes and an FMM module, you’ll have peace of mind knowing your system can detect and respond to leaks before they become disasters. Key Features Complete Starter Kit – Includes FMM module, two leak detection probes, and an Aquabus cable. Apex Integration – Connects directly to any Apex model through Aquabus. Expandable System – Supports up to four leak detection sensors total. Early Leak Detection – Identifies leaks or overflows before they cause damage. Custom Alerts & Actions – Use Apex Fusion to set alarms and control equipment in response to leaks. Multiple Placement Options – Sensors can be positioned anywhere leaks are most likely to occur. Suggested Sensor Locations Under the aquarium stand Beneath carpeting or flooring Next to ATO reservoirs Under RODI systems Near external pumps or equipment Above protein skimmer lids (overflow protection) Product Specifications Module Type: FMM (Fluid Monitoring Module) Sensor Type: LD-2 solid surface leak detection probes Connectivity: Aquabus cable to Apex Compatibility: All Apex models (latest AOS required) Expandable: Supports up to 4 total leak detection probes What’s Included (1) FMM Module (2) LD-2 Solid Surface Leak Detection Probes (1) 3 ft. Aquabus Cable

Overview The Neptune Systems DŌS Dual Reservoir (DDR) is an elegant and practical solution for storing and monitoring your two-part or liquid additives. Designed to integrate seamlessly with the DŌS or DŌS QuietDrive dosing system and Apex Controller, the DDR provides real-time fluid level monitoring through Apex Fusion, ensuring you’ll never be caught off guard when your additives run low. Built with premium cast acrylic and engineered for stability, this reservoir is as stylish as it is functional. Key Features Dual Storage Chambers – Each reservoir holds up to 2 liters of solution for a combined capacity of 4 liters. Seamless Integration – Connects directly to your DŌS or DŌS QuietDrive dosing system. Real-Time Monitoring – Optical sensors track fluid levels and display them in Apex Fusion. Low Center of Gravity – Stable design reduces the risk of tipping or spilling. Easy Refills – Removable lids make topping off solutions quick and convenient. Durable Construction – Made from cast acrylic with push-fit tubing connections for reliability. Product Specifications Dimensions (Approx.): 10.5" x 8.5" x 5.5" Capacity: 2000ml per side (0.52 gallons each) / 4 liters total Material: Cast acrylic Integration: Requires Apex Controller and DŌS or DŌS QuietDrive dosing system for sensor functionality Compatibility: Two-part calcium, alkalinity, and other reef-safe liquid additives Important Note: Not compatible with alcohol-based liquids (can damage reservoir materials). What’s Included DŌS Dual Reservoir (DDR) with sensors and cable 4 meters of dosing tubing Getting Started Guide

Overview The Neptune Systems Apex Display Module adds convenience and visibility to your aquarium management. With its bright orange backlit LCD screen, you can easily monitor essential parameters and access your Apex controller—without needing a smart device or computer. Designed for simplicity and reliability, this display gives you quick access to feed modes, maintenance tasks, and alarm notifications, making reefkeeping more straightforward than ever. Key Features At-a-Glance Monitoring – View critical water parameters instantly. Direct Apex Access – Control your system without relying on Apex Fusion or a smart device. Customizable Screens – Cycle through multiple display views to suit your setup. Quick Task Control – Activate feed modes or maintenance tasks with a simple button press. Alarm Notifications – Built-in speaker provides audio alerts for triggered Apex alarms. Universal Compatibility – Works with all Neptune Systems Apex controllers. Product Specifications Display: Orange backlit LCD screen Compatibility: All Neptune Systems Apex Aquarium Controllers Connection: Wired via Aquabus port Functions: Parameter monitoring, feed/maintenance mode activation, audible alarm notifications What’s Included Apex Display Module Aquabus Connection Cable

Overview The Neptune Systems COR Pump Output Union (1.25") is a genuine replacement fitting engineered for the COR pump series. This durable union fitting ensures a secure and watertight connection for your pump’s output line, while allowing for easy removal or modification of plumbing without the need for cutting or re-gluing. Key Features Direct Replacement – Designed specifically for Neptune Systems COR pump outputs. Durable Construction – Built from high-quality materials for long-lasting reliability. Secure Connection – Provides a tight and leak-resistant fit for your output line. Maintenance-Friendly – Makes it easy to service, upgrade, or modify plumbing connections. Hassle-Free Install – Allows quick replacement without reworking glued plumbing. Product Specifications Part Type: Output union fitting Size: 1.25" Compatibility: Neptune Systems COR pump series Application: Output plumbing connection What’s Included (1) COR Pump Output Union – 1.25"

Overview The Neptune Systems Trident Waste Line Tubing is a genuine replacement part designed to keep your Trident water testing system operating at peak performance. By replacing worn, dirty, or damaged waste lines, you can ensure accurate water testing and maintain the reliability of your Trident system. Key Features Replacement Part – Specifically designed for Neptune Systems Trident water testers. Maintains Accuracy – Provides a clean, clear waste pathway to ensure reliable testing results. Durable & Reliable – Built for long-term use in reef aquarium environments. Easy Installation – Simple swap-out process for routine maintenance. Product Specifications Part Type: Replacement waste line tubing Compatibility: Neptune Systems Trident water testing system Use Case: Replacement for worn, dirty, or damaged tubing What’s Included Neptune Systems Trident Waste Line Tubing

Overview The Neptune Systems EB832 Mounting Bracket is designed to provide a secure, organized, and reliable mounting solution for the EB832 Energy Bar. Built for durability and convenience, this bracket ensures your Energy Bar stays firmly in place, making it easier to manage power connections and maintain a clean, professional-looking setup. Key Features Secure Mounting – Keeps the EB832 Energy Bar firmly in place. Durable Construction – Built from quality materials for long-lasting use. Organized Setup – Helps reduce clutter and keeps cables neatly managed. Easy Access – Positions your Energy Bar for quick maintenance and adjustments. Simple Installation – Compact and straightforward design for quick setup. Product Specifications Part Type: Mounting bracket Compatibility: Neptune Systems EB832 Energy Bar Design: Durable, compact, and low-profile What’s Included EB832 Mounting Bracket

Overview The Neptune Systems Apex Module Mounting Bracket provides a secure and organized way to mount your Apex modules. Designed for durability and convenience, this compact bracket keeps your modules neatly in place, making your aquarium control system easier to manage and maintain. Key Features Secure Mounting – Holds Apex modules firmly in place. Organized Setup – Helps reduce clutter and keeps your system tidy. Durable Construction – Built to last with high-quality materials. Compact Design – Fits seamlessly into aquarium stands or equipment areas. Easy Installation – Quick and simple to set up for immediate use. Product Specifications Part Type: Mounting bracket Compatibility: Neptune Systems Apex modules Installation: Simple screw or adhesive mount (depending on setup) Design: Compact and low-profile What’s Included Apex Module Mounting Bracket

Overview The Neptune Systems DDR Replacement Rigid Tube is a direct replacement for the clear rigid tubing found in the DOS Dual Reservoir (DDR). This part comes preassembled with a 1/4" push-to-connect fitting, making it easy to restore your DDR to proper function and maintain reliable dosing performance. Key Features Direct Replacement – Designed specifically for the DDR (DOS Dual Reservoir). Preassembled Convenience – Rigid tube comes attached to a 1/4" push-to-connect fitting. Durable & Reliable – Maintains a secure connection for accurate dosing. Easy Installation – Simple swap-out process for quick maintenance. Product Specifications Part Type: Replacement rigid tubing with fitting Compatibility: Neptune Systems DDR – DOS Dual Reservoir Fitting Size: 1/4" push-to-connect Tube Type: Clear rigid tubing What’s Included Clear Rigid Tube with 1/4" Push-to-Connect Fitting (preassembled)

Overview Keep your Trident water testing system running smoothly with the Neptune Systems Trident Sample Line Tubing. This replacement tubing ensures accurate test results by replacing worn, dirty, or damaged lines. Regular maintenance with fresh tubing helps preserve the reliability and performance of your Trident system. Key Features Replacement Part – Designed specifically for Neptune Systems Trident water testers. Maintains Accuracy – Ensures clean, unobstructed sample flow for reliable testing results. Durable Construction – Built to handle continuous use in reef aquariums. Easy to Install – Simple swap-out process for quick maintenance. Product Specifications Part Type: Replacement sample line tubing Compatibility: Neptune Systems Trident water testing system Use Case: Replacement for worn, dirty, or damaged tubing What’s Included Neptune Systems Trident Sample Line Tubing

Overview Say goodbye to manual testing and guesswork in your reef tank! The Neptune Systems Trident is a fully automated water testing solution for saltwater aquariums. It regularly tests Alkalinity, Calcium, and Magnesium, then sends results directly to your Apex Controller for real-time monitoring, alerts, and seamless integration with your dosing pumps. When paired with the Neptune DŌS or DŌS QuietDrive, the Trident becomes the ultimate tool for automated dosing control, ensuring stable parameters for thriving corals and a healthier reef system. Key Features Hands-Free Testing – Automatically performs precision titration tests for Alkalinity, Calcium, and Magnesium. Fast Setup – From box to testing in less than 15 minutes, no calibration or complicated prep needed. Plug & Play Integration – Works directly with your Neptune Apex (A2/A3 models; see requirements). Programmable Alerts – Get instant notifications when levels fall outside safe ranges. Graph & Monitor in Apex Fusion – Easily track trends and understand your reef’s chemistry in real time. Automated Dosing Control (ADC) – When combined with the Neptune DŌS, dosing automatically adjusts to keep parameters stable. Ultra-Quiet Operation – Virtually silent while running inside your aquarium cabinet. Simple Reagent Swaps – One-month reagent supply included; replacements available in 2-month kits. Product Specifications Dimensions: 9.8" x 12.4" x 4.9" Alkalinity Precision: ±0.05 dKh Calcium Precision: ±15 ppm Magnesium Precision: ±15 ppm Testing Time: ~7 minutes per test Sample Water Required: ~8mL per test Max Head Height: Less than 4 ft. from water sample Reagent Life: ~1 month (at default schedule: 4-Alk, 2-Ca, 2-Mg tests/day) What’s Included 1x Trident Testing System 1x 1Link Cable 5 ft. Black Sample Tubing 5 ft. Clear Waste Tubing 1x 2-Month Reagent Supply Kit (lasts ~45 days at default test schedule) Requirements Neptune Systems A3 Apex (Pro, Apex, Apex Jr.) or A2 Apex (Apex, Apex EL) Open 1Link port OR 24V power supply with Aquabus cable Apex Jr. users require a 36W 24VDC Power Supply & Aquabus cable For automated dosing, a Neptune DŌS or DŌS QuietDrive (sold separately)