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Overview Protect your aquarium and home from unexpected water damage with the Neptune Systems LD-2 Leak Detection Probe. Designed for use with the FMM Module, this full-size sensor provides reliable leak detection in a variety of locations, allowing your Apex Controller to notify you immediately when water is detected. Key Features Reliable Leak Detection – Alerts your Apex system the moment water touches the sensor. Full-Size Sensor – Ideal for placement in stands, on hard floors, or on top of skimmer cups. Weighted Design – Stays flat and secure for consistent performance. Flexible Placement – Place almost anywhere a leak or overflow could cause damage. Seamless Integration – Works directly with the Neptune Systems FMM Module. Product Specifications Model: LD-2 Leak Detection Probe Compatibility: Neptune Systems FMM Module (not compatible with ALD module) Application: Leak detection for skimmer cup overflow, sump, or floor protection What’s Included (1) Neptune Systems LD-2 Leak Detection Probe

Overview The Neptune Systems FMM (Fluid Monitoring Module) adds powerful versatility to your Apex Controller, providing solutions for flow monitoring, leak detection, water level management, and DC24 accessory control. With four universal sensor ports and a DC24 accessory port, the FMM allows you to integrate a wide variety of Neptune sensors and accessories to keep your aquarium safe, stable, and running smoothly. Key Features Flow Monitoring – Track real-time flow with Neptune’s inline flow sensors (FS-25, FS-50, FS-100, FS-200). Leak Detection – Connect up to four leak detection probes (LD-1, LD-2, LD-3) for early water spill alerts. Water Level Management – Use optical sensors (MOS, OS-1) or liquid level sensors (LLS, in 4–35" lengths) for ATO, sump monitoring, or dosing containers. DC24 Accessory Port – Power accessories such as the PMUP utility pump or SV-1 solenoid valve (requires 36W 24V power supply, sold separately). Expandable & Flexible – Four universal sensor ports support a wide range of accessories. Seamless Apex Integration – Plug-and-play connectivity with Apex Fusion for alerts, automation, and logging. Product Specifications Model: FMM (Fluid Monitoring Module) Sensor Ports: 4x universal ports for flow, leak, or optical sensors Accessory Ports: 1x DC24 port (requires 36W 24V DC power supply, sold separately) Connectivity: AquaBus (cable included) Compatibility: All Neptune Systems Apex Controllers What’s Included (1) Neptune Systems FMM Fluid Monitoring Module (1) AquaBus Cable

Overview The Neptune Systems FS-200 Flow Sensor is designed for use with the FMM (Fluid Monitoring Module) to provide accurate flow monitoring of large aquarium return pumps and plumbing. With a wide operating range of 300–3000 GPH, this sensor gives real-time flow data directly to your Apex, allowing you to fine-tune system performance and be alerted to pump or plumbing issues before they become critical. Key Features High-Capacity Flow Monitoring – Measures flow rates from 300–3000 GPH. Inline Installation – Installs directly onto standard 2" PVC plumbing. Apex Integration – Connects to the FMM module to deliver flow rate data to Apex Fusion. Durable Construction – Built for reliable long-term use in saltwater and freshwater systems. Custom Fittings Included – Comes with two BSPP x 2" slip unions for seamless integration with standard PVC plumbing. Product Specifications Model: FS-200 Flow Sensor Connection: FMM module (Fluid Monitoring Module) Flow Range: 300–3000 GPH Plumbing Size: 2" Slip PVC Thread Type: BSPP (British Standard Parallel Pipe) Application: Inline installation for return pumps or large flow lines What’s Included (1) FS-200 2" Flow Sensor (2) BSPP x 2" Slip Unions

Overview The Neptune Systems FS-50 Flow Sensor provides precise flow monitoring for smaller aquarium plumbing lines. Typically used with return pumps or auxiliary equipment like reactors, this inline sensor connects to the FMM (Fluid Monitoring Module) and delivers real-time flow data directly to your Apex system. With a monitoring range of 30–250 GPH, the FS-50 is ideal for smaller flow applications where accuracy and reliability matter most. Key Features Accurate Flow Monitoring – Measures flow rates from 30–250 GPH. Inline Installation – Installs easily into standard 1/2" PVC plumbing. Apex Integration – Works with the FMM module to report live flow data to Apex Fusion. Durable Construction – Built to withstand long-term use in both freshwater and saltwater systems. Custom Fittings Included – Comes with two BSPP x 1/2" slip unions for seamless PVC integration. Product Specifications Model: FS-50 Flow Sensor Connection: FMM Module (Fluid Monitoring Module) Flow Range: 30–250 GPH Plumbing Size: 1/2" Slip PVC Thread Type: BSPP (British Standard Parallel Pipe) Application: Inline installation for small return pumps, reactors, or other flow lines What’s Included (1) FS-50 1/2" Flow Sensor (2) BSPP x 1/2" Slip Unions

Overview The Neptune Systems FS-25 Flow Sensor is designed for precise monitoring of small flow lines in your aquarium system. Ideal for applications like RO/DI inputs or calcium reactor feed lines, this inline sensor connects to the FMM (Fluid Monitoring Module) and delivers real-time flow data directly to your Apex. With a monitoring range of 3–12 GPH and quick-connect compression fittings, the FS-25 is perfect for fine-tuning low-flow applications. Key Features Accurate Low-Flow Monitoring – Measures flow rates between 3–12 GPH. Ideal for Specialized Equipment – Perfect for RO/DI inputs, calcium reactor feeds, and other low-flow lines. Apex Integration – Connects to the FMM module to report live flow data in Apex Fusion. Quick & Easy Installation – Compression fittings ensure fast, secure setup. Extended Reach – Includes a 3-meter wire for flexible placement. Product Specifications Model: FS-25 Flow Sensor Connection: FMM Module (Fluid Monitoring Module) Flow Range: 3–12 GPH Plumbing Size: 1/4" tubing with compression fittings Wire Length: 3 meters Application: Inline monitoring of low-flow lines such as RO/DI or reactor feeds What’s Included (1) FS-25 1/4" Flow Sensor with Compression Fittings

Overview The Neptune Systems FS-100 Flow Sensor allows you to accurately measure and monitor water flow through your aquarium’s plumbing. Designed for use with the FMM (Fluid Monitoring Module), this inline sensor provides real-time data to your Apex, helping you optimize return pump performance and quickly detect clogs, restrictions, or pump issues. With a flow range of 150–1500 GPH, it’s ideal for medium-to-large aquarium systems. Key Features Accurate Flow Monitoring – Measures flow rates between 150–1500 GPH. Inline Installation – Fits seamlessly into standard 1" PVC plumbing. Apex Integration – Connects to the FMM for real-time data in Apex Fusion. Durable & Reliable – Built to withstand continuous aquarium use in freshwater or saltwater. Custom Fittings Included – Comes with two BSPP x 1" slip unions for easy installation with standard plumbing. Product Specifications Model: FS-100 Flow Sensor Connection: FMM Module (Fluid Monitoring Module) Flow Range: 150–1500 GPH Plumbing Size: 1" Slip PVC Thread Type: BSPP (British Standard Parallel Pipe) Application: Inline installation for return pumps or flow lines What’s Included (1) FS-100 1" Flow Sensor (2) BSPP x 1" Slip Unions

Overview Take the guesswork out of your aquarium’s flow rates with the Neptune Systems Flow Monitoring Kit (FMK). By connecting to your Apex through the included Fluid Monitoring Module (FMM), the FMK lets you measure and track real-time flow through return pumps, reactors, refugiums, and more. Knowing your true flow rate not only improves system efficiency but also provides early warnings of pump issues, clogged lines, or other performance problems. Key Features Know Your Flow – Accurately measure flow through return pumps, reactors, or other plumbed equipment. Complete Starter Kit – Includes FMM Module, flow sensors, and adapter fittings for multiple applications. Real-Time Alerts – Apex can notify you if flow stops or drops due to pump failure, clogging, or restrictions. Flexible Applications – Use on return pumps, carbon/GFO/biopellet reactors, refugium lines, or other inline devices. Expandable Design – FMM has four ports; add another flow sensor, water-level sensor, or leak detector. DC24 Accessory Port – Power Neptune accessories like the PMUP or Solenoid Valve (with optional power supply). Simple Plug & Play Setup – Just plug sensors into the FMM, add them in Apex Fusion, and start monitoring. Benefits Protects your aquarium by detecting pump failures instantly. Helps maintain optimal flow rates for reactors and nutrient export. Reduces risk of undetected clogs, algae buildup, or channeling inside plumbing. Provides data-driven insights for pump performance vs. rated output. Expands Apex functionality with water-level sensing, leak detection, and DC24 accessories. Product Specifications FMM Module Ports: 4 sensor inputs + 1 DC24 accessory port Flow Sensor Ratings: 1/2" FS-50: 30–250 GPH 1" FS-100: 150–1500 GPH Flow Sensor Type: Turbine or paddle-wheel mechanism (model dependent) Connection: Aquabus to Apex system Expandable Sensors: Available in 1/4", 1", and 2" sizes What’s Included (1) FMM Module (Fluid Monitoring Module) (1) 1" FS-100 Flow Sensor (2) 1/2" FS-50 Flow Sensors (2) 1" Unions (4) 1/2" Adapters

Overview The Neptune Systems Energy Bar 832 (EB832) is more than just a power strip — it’s a smart, fully integrated power management hub designed exclusively for Apex Aquarium Controllers. With eight independently controlled outlets, built-in 24VDC power supply, 1Link ports, and advanced monitoring, the EB832 gives aquarists complete control over their aquarium equipment. Whether you’re at home or across the world, you’ll know exactly what’s happening with your devices through Apex Fusion. Key Features 8 Independent Outlets – Each outlet supports up to 7 amps and can be individually programmed and monitored. Power Monitoring – Track power usage per outlet (amps or watts) to detect failures, unusual draws, or inefficiencies. Three 1Link Ports – Directly power and control Neptune accessories like the DŌS QuietDrive, COR15 Return Pump, or Trident without extra power supplies. Two 24VDC Accessory Ports – Run add-ons such as the PMUP Utility Pump, SV-1 Solenoid Valve, or GRO Refugium Light. Integrated 100W Power Supply – Eliminates the need for bulky adapters while reducing outlet consumption. Visual Status Indicators – LED lights on each outlet provide quick, at-a-glance status updates. Apex Fusion Integration – Program, monitor, and receive alerts through Neptune’s powerful cloud platform. Safety Certified – UL-certified design ensures reliability and peace of mind. Product Specifications Dimensions: 10" (L) x 6.5" (H) x 2.25" (W) Max Per Outlet Amperage: 7 amps Max Total Amperage: 15 amps Requirements: Neptune Systems Apex Controller (A2/A3 Series). Not compatible with Apex Classic controllers. What’s Included 1x Energy Bar 832 (EB832) 1x 3 ft. AquaBus Cable

Overview The Neptune Systems Double Junction pH Probe is designed for longer life, fewer calibrations, and more reliable readings compared to traditional lab-grade probes. By isolating the reference gel and probe from proteins and organics, the double junction design prevents clogging and contamination, extending probe life and reducing maintenance. Perfect for replacing worn probes or expanding monitoring, this high-quality probe is built for accuracy and durability. Key Features Double Junction Design – Isolates the sensing element from contaminants, greatly extending probe life. Longer Lasting – Outperforms standard lab-grade probes, requiring fewer replacements. Reliable & Stable Readings – Maintains accuracy for longer periods between calibrations. Universal Compatibility – Fits any monitor or controller with a BNC-style connector. Quality Construction – Built to withstand the demands of aquarium use. Product Specifications Type: Double Junction Lab Grade pH Probe Connection: BNC-style connector Cord Length: 10 ft. Compatibility: Works with Neptune Systems Apex and most other controllers/monitors with BNC connections Calibration: Recommended every 60–90 days for best accuracy (solution sold separately) What’s Included (1) Neptune Systems Double Junction Lab Grade pH Probe with 10 ft. cord

Overview The Neptune Systems Double Junction ORP Probe is built for longevity, reliability, and accuracy. Unlike traditional lab-grade probes, the double junction design isolates the reference gel from proteins and organics that can clog and contaminate the sensor. This results in longer probe life, fewer calibrations, and more stable readings—making it an ideal replacement or upgrade for your aquarium monitoring system. Key Features Double Junction Design – Prevents contamination of the sensing element for longer-lasting performance. Reliable Readings – Provides stable and accurate ORP measurements with reduced drift. Universal Compatibility – Works with Neptune Apex and any monitor or controller using a BNC-style connector. Durable Construction – Lab-grade probe designed to withstand continuous use in aquarium environments. Low Maintenance – Requires calibration less frequently than standard probes. Product Specifications Type: Double Junction Lab Grade ORP Probe Connection: BNC-style connector Cord Length: 10 ft. Compatibility: Neptune Apex and other controllers/monitors with BNC connectors Calibration: Recommended every 60–90 days (calibration solutions sold separately) What’s Included (1) Neptune Systems Double Junction Lab Grade ORP Probe with 10 ft. cord

Overview The Neptune Systems DŌS QuietDrive (QD) is the next evolution of Neptune’s trusted dosing system, now enhanced with EcoTech QuietDrive technology for whisper-quiet performance and greater flexibility. With precise, programmable control via Apex Fusion, the DŌS QD automates critical dosing tasks, micro-dosing, and even automatic water changes, reducing daily maintenance and providing unmatched reliability. Key Features QuietDrive Technology – Up to 400% quieter at high speeds and 200% quieter at slow speeds compared to the original DŌS. Continuous Duty Modes – Run continuously at speeds up to 25 ml/min, perfect for stable additive dosing. Precision Control – Stepper motor design allows dosing as little as 0.1 ml at a time. Automatic Water Changes – Easily schedule water changes up to 30 gallons per day (12 gallons/day in Quiet Zone). Simplified Operation – New backlit, water-resistant priming buttons with L/R indicators. 1LINK Powered – Single cable provides both power and communication, eliminating bulky power bricks. Modern Design – Restyled in a sleek dark gray finish to match the Neptune SKY LED aesthetic. Easy Maintenance – Pump heads snap on and off for fast tubing replacement without tools. DDR Compatible – Connects to the DOS Dual Reservoir (sold separately) for automated low-fluid alerts. Common Applications Two-Part Dosing – Automate calcium and alkalinity dosing for improved reef stability. Micro-Dosing – Perfect for ultra-low volume additives like carbon dosing or Zeovit systems. Automatic Water Changes – Simplify maintenance and improve consistency with scheduled water changes. Specifications Dimensions (Approx.): 9.5" x 5" x 5" Max Lift Height: 24 ft Max Suction Height: 24 ft Flow Rate: 0.1 ml – 250 ml/min (variable) Power: 24VDC via 1LINK Compatibility: Requires A2 or A3 Series Apex Controller What’s Included (1) Neptune Systems DŌS QuietDrive Dosing Pump (1) 1LINK Cable (4 Meters) 6mm Tubing (1) 50ml Graduated Cylinder for Calibration

Overview The Neptune Systems DC24 to Bare Wire Accessory Cable makes it easy to power and control custom 24V DC accessories directly from your Apex system. Designed for use with the DC24 ports on the 1LINK Module or Energy Bar 832, this cable allows you to connect pumps, fans, solenoids, or other 24V devices (up to 35W) and operate them with full Apex outlet-style control. Key Features Custom Accessory Integration – Connect pumps, fans, solenoids, or other 24V DC devices to your Apex. Apex Control – Power accessories through your Apex with the same on/off outlet-style functionality. Plug & Play Connection – One end connects to your Energy Bar 832 or 1LINK Module; the other end features tinned bare wires for direct accessory connection. Long Reach – 10 ft cable length provides flexibility for equipment placement. Safe & Reliable – Supports accessories up to 24V DC and 35W max draw. Product Specifications Cable Type: DC24 to Bare Wire Accessory Cable Length: 10 ft Connections: 1x DC24 connector, 2x tinned bare wire ends Power Rating: 24V DC, max 35W Compatibility: Neptune Systems Energy Bar 832 and 1LINK Module What’s Included (1) Neptune Systems DC24 to Bare Wire Accessory Cable – 10 ft

Overview Simplify your reefkeeping routine with the Neptune Systems ATK (Auto Top Off Kit), a complete, plug-and-play solution for replacing evaporated aquarium water. Designed to work as a standalone ATO system or integrate seamlessly with your Apex Controller, the ATK combines advanced automation with multiple layers of safety. Featuring two solid-state optical sensors, a mechanical float valve, intelligent water run-time monitoring, and audible alarms, the ATK ensures safe, reliable top-offs without the daily hassle. Key Features Standalone or Apex-Ready – Works right out of the box without an Apex; unlock advanced features when paired with one. Multiple Layers of Safety – Includes dual optical sensors, a mechanical float valve, and IQ-Fill water run-time protection. Powerful Pump Included – PMUP v2 utility pump moves water up to 14 feet vertically, perfect for remote or basement reservoirs. Smart Design – Vertical pump orientation with removable intake screen for easy cleaning and maintenance. Audible Alarms – Alerts you if sensors detect overfilling or prolonged pump run times. Expandable – FMM module includes two additional ports for adding leak detectors, flow sensors, or more optical sensors. Safety Features Backup Optical Sensor – Stops pump and sounds alarm if primary sensor fails. IQ-Fill (Standalone Mode) – Limits fill amount to prevent overfilling in case of failure. Mechanical Float Valve – Final fail-safe stops water physically if electronic sensors fail. Product Specifications Pump Type: PMUP v2 Multi-Purpose Utility Pump Pump Capacity: Up to 100 GPH / 14 ft. head height Sensors: Two solid-state optical water level sensors Float Valve: Mechanical fail-safe shutoff Power Supply: 24V 36W included Tubing: 4 meters orange RO tubing (3/8" and 1/4" fittings included) Module: FMM Fluid Monitoring Module with 4 sensor ports What’s Included FMM Fluid Monitoring Module (2) Optical Water Level Sensors Mechanical Float Valve 90° Tube Fitting PMUP v2 ATO Pump 4 Meters Orange RO Tubing 3/8" to 1/4" Push Connect Adapter Fitting 1/4" Push Connect Siphon Break Set Screw (for non-float valve applications) 24V 36W Power Supply

Overview The Neptune Systems VDM Module adds advanced 0–10V analog control to your Apex system, allowing you to fine-tune compatible pumps and lighting fixtures directly from your Apex Fusion dashboard. With plug-and-play setup, dual AquaBus ports, and reliable performance, the VDM makes it easy to expand your Apex system’s control over flow, lighting, and other variable-speed devices. Key Features Expanded Control – Adds two 0–10V ports, each with two independent channels. Pump Integration – Manage flow rates and pulsing modes on compatible pumps like Tunze 6105, 6155, and 6255 (interface cable required, sold separately). Lighting Customization – Program dimming and spectrum changes on select LED fixtures such as Kessil A80, A160, and older A360W models. DIY Ready – Works with custom or third-party devices that use 0–10V analog input. Seamless Apex Fusion Integration – Adjust settings, program schedules, and monitor performance with ease. Plug & Play Setup – Automatically recognized by Apex with LED status indicator for troubleshooting. Flexible Expansion – Dual AquaBus ports allow integration into star or daisy-chain configurations. Compatibility Notes Requires a Neptune Apex base unit (A3, A2, or legacy Apex models). Compatible with many 0–10V controllable pumps and LED fixtures. Not compatible with Neptune 1LINK accessories or lights that use digital/wireless protocols. Interface cables for pumps/lights sold separately. Product Specifications Model: VDM Variable Speed/Dimming Module Ports: 2x 0–10V ports (4 independent channels), 2x AquaBus ports Indicator: LED status light Cable: 3 ft. AquaBus cable included Compatibility: Apex A3, A2, and legacy Apex Controllers What’s Included (1) Neptune Systems VDM Module (1) 3 ft. AquaBus Cable

Overview Start measuring salinity in your reef with the Neptune Systems Conductivity Probe. Whether you’re replacing an old probe or adding salinity monitoring to your Apex Aquarium Controller, this probe delivers accurate, real-time measurements to help you maintain a stable environment for your livestock. Consistent salinity is essential to the health of corals, fish, and invertebrates, and this probe allows you to catch changes before they become problems. Key Features Accurate Salinity Monitoring – Provides real-time conductivity readings to help maintain a stable reef environment. Apex Compatible – Connects directly to Apex controllers equipped with a salinity port. Expandable Option – Add salinity monitoring to Apex systems without a salinity port by using the PM2 Salinity Module (sold separately). Early Alerts – Be notified of salinity swings before they impact tank health. Durable & Reliable – Built for long-term use in reef aquarium conditions. Calibration (Solutions Sold Separately) Saltwater Calibration: 53,000 µS Conductivity Solution (approx. 35ppt) Freshwater Calibration: 447 µS Conductivity Solution Product Specifications Type: Conductivity probe (salinity monitoring) Compatibility: Neptune Systems Apex controllers (PM2 module required if no salinity port available) Application: Saltwater or freshwater aquariums What’s Included (1) Neptune Systems Conductivity Probe

Overview The Neptune Systems Automatic Feeding System (AFS) makes feeding your aquarium simple, consistent, and worry-free. Designed to integrate seamlessly with your Apex Controller, the AFS can deliver precise portions of flake or pellet food multiple times a day. Whether you’re at home or away, your fish benefit from smaller, more frequent feedings that reduce waste and improve health—all while keeping your water clean. Key Features Consistent Feeding – Automatically feeds your fish while at home or away. Supports Flake & Pellet Foods – Works with most common fish diets. Crossover Diet Compatible – Ideal with Neptune’s Crossover Diet Pellets that feed both fish and corals. Custom Feeding Routines – Program your Apex to turn off pumps and skimmers during feedings for maximum efficiency. Stay-Dry System – Innovative retractable delivery system and gasket-sealed container keep food dry and clump-free. Compact & Practical – Small footprint with easy mounting options. Product Specifications Dimensions: 6.25" x 3" x 3.75" (includes AquaBus plug) Food Capacity: Up to 100 mL of most pellets and flakes Connection: AquaBus (Apex required to operate) Compatibility: All Neptune Apex Controllers What’s Included Neptune Systems AFS (Automatic Feeding System) Mounting Bracket 15’ AquaBus Cable Hook & Loop Tape

Overview The Neptune Systems Long-Life Temperature Probe provides accurate and durable temperature monitoring for your aquarium. Use it as a replacement for your existing probe, add one to a second tank, or connect it to a PM2/PM3 module for temperature-compensated readings. Built to withstand continuous submersion, this probe ensures reliability and consistency in both freshwater and saltwater environments. Key Features Accurate Monitoring – Provides precise temperature readings for stable aquarium conditions. Long-Life Design – Built for extended use with durable construction. Flexible Applications – Replace your current probe, add to another tank, or pair with PM2/PM3 for compensation. Universal Compatibility – Works with all Neptune Systems Apex controllers and modules. Plug & Play – Easy to install with a simple connection to your system. Product Specifications Type: Long-life aquarium temperature probe Compatibility: All Neptune Systems Apex controllers and PM2/PM3 modules Application: Freshwater and saltwater aquariums Connection: Direct plug-in to Apex base or module What’s Included (1) Neptune Systems Long-Life Temperature Probe

Overview The Neptune Systems DOS Replacement Tubing is designed for use with the DOS Dosing and Fluid Metering System. Perfect for replacing worn tubing or extending the reach between your pump, reservoirs, and aquarium, this tubing provides a reliable and flexible solution for precise dosing. Key Features Direct Replacement – Compatible with the Neptune Systems DOS dosing system. Extend Reach – Perfect for longer runs between pump, DDR reservoirs, or your tank. Durable & Flexible – Built for reliable long-term performance in aquarium environments. Easy Installation – Simple to cut, connect, and replace. Product Specifications Part Type: Replacement tubing Compatibility: Neptune Systems DOS Dosing & Fluid Metering System Available Lengths: 4 meters 16 meters What’s Included Neptune Systems DOS Replacement Tubing (choose length: 4m or 16m)

Overview The Neptune Systems PM2 Salinity Module adds advanced conductivity and salinity monitoring to your Apex Aquarium Controller. Designed for reef aquariums, the PM2 allows for real-time tracking of salinity and temperature while also providing I/O expansion for float switches, leak detectors, and other accessories. With full Apex Fusion integration, you can log data, set alarms, and automate responses to maintain stable water chemistry. Key Features Real-Time Monitoring – Provides continuous conductivity/salinity and temperature tracking. Multiple Ranges – Selectable measurement ranges: 0–900 µS/cm 0–9.0 mS/cm 0–90.0 mS/cm 0–50 ppt I/O Expansion – Includes six digital inputs for float switches, leak alarms, and pressure sensors. Data Logging – Full integration with Apex for monitoring, alerts, and automation. Plug & Play Setup – Automatically recognized when connected to Apex. Flexible Connectivity – Equipped with two AquaBus ports for easy expansion. Reliable Readings – Galvanic isolation ensures accurate and stable probe data. Upgradeable Firmware – Keeps the module current with future Apex system updates. Universal Compatibility – Works with all Neptune Systems Apex Controllers. Product Specifications Model: PM2 Salinity Expansion Module Probe Support: 1x Conductivity/Salinity probe (sold separately) + 1x Temperature probe (sold separately) I/O Inputs: 6 digital inputs for external switches/sensors Connectivity: 2x AquaBus ports Cable: 3 ft. AquaBus cable included Indicator: LED status light System Capacity: Supports up to 240 AquaBus modules in one Apex system What’s Included (1) Neptune Systems PM2 Salinity Expansion Module (1) 3 ft. AquaBus Cable Note: Salinity and temperature probes sold separately.

Overview The Neptune Systems PM1 Module expands the monitoring capabilities of your Apex Controller by adding support for an additional pH or ORP probe, along with temperature monitoring and I/O expansion. Whether you want to track pH in a calcium reactor, monitor ORP for ozone control, or add redundancy across multiple aquariums, the PM1 provides reliable and versatile functionality. Key Features Dual Probe Capability – Supports either a pH or ORP probe (sold separately). Additional Temperature Monitoring – Extra port for a temperature probe (sold separately). I/O Expansion – Includes an I/O port for use with the Breakout Box to connect switches or buttons. Seamless Apex Integration – Connects via AquaBus and is compatible with all Apex systems. Flexible Applications – Monitor a second tank, automate calcium reactors, control ozone generators, or track ambient air temperature. Expandable Control – Use the I/O port to trigger feed modes, timers, float switches, and more. Product Specifications Model: PM1 Module Ports: 1x pH/ORP probe port 1x temperature probe port 1x I/O port 2x AquaBus ports Compatibility: All Neptune Apex Controllers Connectivity: AquaBus (3 ft. cable included) What’s Included (1) PM1 Module (1) 3 ft. AquaBus Cable Note: Probes and accessories sold separately.