Overview Keep your pH probe accurate and reliable with the Neptune Systems 7.00 pH Single-Use Calibration Packet. Over time, pH probes can drift and lose accuracy, but with regular calibration, you can ensure precise monitoring of your aquarium’s water chemistry. This convenient, pre-measured packet makes calibration simple—just tear it open and insert your probe directly into the solution. Key Features Single-Use Convenience – Pre-measured solution for quick, no-mess calibration. Accurate Results – Ensures reliable pH probe readings for better tank management. Low Point Calibration – Perfect for use as the low reference (7.0) in two-point calibration. Universal Compatibility – Works with Neptune Systems Apex and most other aquarium controllers. Routine Maintenance – Recommended every 3 months for standard probes and up to 6 months for double junction probes. Product Specifications Solution Type: 7.00 pH calibration solution Form: Single-use, tear-open packet Application: pH probe calibration for aquariums and monitoring devices What’s Included (1) 7.00 pH Single-Use Calibration Packet

Overview Show off your reefing pride with the Neptune Systems Shield Sticker. Featuring the iconic Neptune Systems logo, this high-quality sticker is perfect for personalizing your aquarium equipment, laptop, water bottle, or any smooth surface. Durable and easy to apply, it’s a simple way to add a bold touch of Neptune style to your everyday gear. Key Features Iconic Logo – Displays the Neptune Systems shield for a clean, recognizable look. Durable Material – Built to last with high-quality construction. Easy Application – Adheres smoothly to most flat surfaces. Versatile Use – Great for laptops, water bottles, gear, or aquarium equipment. Product Specifications Dimensions: 3.5" x 2.5" Design: Neptune Systems Shield Logo Material: High-quality, durable vinyl What’s Included (1) Neptune Systems Shield Sticker

Overview The Neptune Systems PM3 Module brings advanced dissolved oxygen monitoring to your Apex Aquarium Controller. Dissolved oxygen (DO) is one of the most critical—yet often overlooked—parameters in reef aquariums. With real-time monitoring, the PM3 allows you to protect your fish and corals from dangerously low oxygen levels by setting alerts and automating equipment like pumps and air stones when DO drops below safe levels. Key Features Real-Time Monitoring – Tracks dissolved oxygen levels continuously. Critical Safety Alerts – Configure Apex Fusion to send notifications or trigger equipment if oxygen falls too low. Additional Ports – Includes an extra temperature probe port (sold separately) and I/O switch inputs for added flexibility. Apex Integration – Seamlessly connects via AquaBus and is compatible with all Apex systems. Plug & Play Setup – Automatically recognized when connected to your Apex. Lab-Grade Accuracy – Works with Neptune’s high-quality dissolved oxygen probe (sold separately) featuring a replaceable membrane. Expandable Monitoring – Add float switches, leak alarms, pressure sensors, and more through the I/O port. Why Monitor Dissolved Oxygen? Fish & Coral Health – Levels below 4.5 ppm can stress livestock, and levels below 3 ppm may cause fatalities. Nutrient Control Systems – Methods like biopellets, carbon dosing, or nitrate reactors can rapidly deplete oxygen. Overstocked Systems – Extra waste and detritus consume oxygen during breakdown, creating hidden risks. Surface Gas Exchange – Ensures proper O2/CO2 balance and supports stable tank chemistry. Product Specifications Model: PM3 Dissolved Oxygen Module Connections: 1x Dissolved Oxygen probe port (probe sold separately) 1x Temperature probe port (optional probe sold separately) 6x Digital inputs for switches/sensors 2x AquaBus connectors Features: Galvanic isolation, LED status indicator, firmware upgradable Compatibility: All Apex Controllers (Apex required, sold separately) What’s Included Neptune Systems PM3 Dissolved Oxygen Module 3 ft. AquaBus Cable Note: Dissolved Oxygen probe sold separately. Apex Controller required.

Overview The Neptune Systems COR Pump Plumbing Parts provide convenient replacement fittings for the inlet and outlet connections on your COR pump. Designed to simplify maintenance and upgrades, these fittings allow you to easily swap out glued plumbing connections without the hassle of cutting or reconfiguring your aquarium’s plumbing. Key Features Direct Replacement – Designed specifically for Neptune Systems COR pump inlet and outlet connections. Maintenance-Friendly – Makes it easy to replace glued plumbing parts when updating or servicing your system. Durable Construction – Built from high-quality materials for long-lasting reliability. Easy Installation – Simple to attach for quick upgrades or replacements. Product Specifications Part Type: Inlet & outlet replacement fittings Compatibility: Neptune Systems COR pumps Use Case: Replacement or upgrade of existing glued plumbing connections What’s Included COR Pump Inlet Fitting COR Pump Outlet Fitting

Overview Expand your Apex Controller setup with the Neptune Systems Energy Bar 4 (EB4). Built for reliability and heavy-duty performance, the EB4 provides four individually controlled outlets, including one high-output port rated for 12 amps—perfect for powering chillers, large heaters, or other high-energy aquarium equipment. With its rugged aluminum construction and seamless Apex Fusion integration, the EB4 is a dependable and efficient way to scale your system. Key Features 4 Controlled Outlets – Three 8A outlets plus one 12A high-output outlet. Heavy-Duty Performance – The 12A outlet is ideal for chillers, large heaters, or other power-hungry equipment. Soft-Start Technology – Gently ramps up pumps and powerheads to extend equipment life. Durable Build – Constructed from powder-coated 16-gauge aluminum for long-lasting protection. Seamless Integration – Works directly with Apex and Apex Fusion for simple programming and remote management. Compact Expansion – Perfect when you need just a few more outlets without the cost or bulk of an additional EB832. EB4 vs. EB832 EB4 Strengths: Compact, rugged build with a dedicated 12A outlet for high-draw devices. EB832 Strengths: Offers advanced features such as per-outlet power monitoring, 1LINK ports, and built-in 24V ports. Best Use Case for EB4: When you need fewer outlets or a heavy-duty option for a single high-power device. Specifications Total Outlets: 4 (3) Rated 8A @ 120V AC (1) Rated 12A @ 120V AC Max Total Current: 15A Soft-Start: Yes Construction: Powder-coated 16-gauge aluminum AquaBus Ports: 2 Requirements: Neptune Systems Apex Controller What’s Included (1) Neptune Systems EB4 Energy Bar 4 (1) AquaBus Cable (3 ft)

Overview The Neptune Systems A3 Apex Jr. provides essential monitoring and control for aquarists who want reliable automation without unnecessary complexity. Designed as an affordable entry point into the Apex ecosystem, the Apex Jr. tracks critical parameters, alerts you to potential problems, and controls up to four pieces of equipment through the included Energy Bar 4. With WiFi connectivity and access to the Apex Fusion app, you can monitor and manage your aquarium from anywhere in the world. Key Features Essential Monitoring – Keep tabs on temperature, pH, water level, and leaks. Reliable Equipment Control – Energy Bar 4 features four individually controlled outlets with soft-start technology. WiFi Connectivity – Built-in wireless connection to the Apex Fusion cloud for real-time monitoring and control. User-Friendly Fusion App – Customize dashboards, log parameters, and receive instant alerts. Expandable Ecosystem – Add modules like PM2 for salinity monitoring or DOS QuietDrive for precision dosing. Lab-Grade Probes – Includes double junction pH probe and temperature probe for accuracy and stability. Protect Against Leaks – Comes with MOS Magnetic Optical Sensor and LD-2 Leak Detection Sensor for safety. A3 Apex Jr. System Components A3 Apex Jr. Base Unit Tracks temperature, pH, water level, and leaks. Equipped with two AquaBus ports for connecting to the EB4 and additional modules. Energy Bar 4 4 independently controlled outlets (3 rated at 8A, 1 rated at 12A @ 120V AC). Built with 16-gauge powder-coated aluminum for durability. Reports power usage to the Apex Controller for intelligent load management. Soft-start function protects pumps and powerheads. MOS Magnetic Optical Sensor Low-profile water level sensor that detects wet/dry states using infrared light. Mounts on reservoirs or sump walls up to 1/4" thick. LD-2 Leak Detection Sensor Weighted full-size probe designed for flat surfaces like floors or inside aquarium cabinets. Instantly notifies your Apex if water is detected. Probes Temperature Probe – Detects and alerts when temperature leaves safe range. Double Junction pH Probe – Long-lasting accuracy with less frequent calibration. Specifications Head Unit Dimensions: 4.75" L x 5.25" H x 3.25" W Energy Bar 4 Dimensions: 10" L x 6.5" H x 2.25" W Connectivity: WiFi Outlets: 4 (individually controlled) What’s Included (1) A3 Apex Jr. Base Unit (1) Power Supply (1) Temperature Probe (1) Double Junction pH Probe (1) MOS Magnetic Optical Sensor (1) LD-2 Leak Detection Sensor (1) EB4 Energy Bar 4 (1) Set of Calibration Solutions (pH 7 & 10) Mounting Screws Getting Started Card

Overview Protect your aquarium stand and equipment with the Neptune Systems Trident Drip Tray. While leaks from the Trident are uncommon, this custom-fit tray provides extra peace of mind by catching any minor drips or spills that may occur. Designed specifically for use with the Trident and Trident NP, it helps maintain a clean, safe, and organized aquarium setup. Key Features Custom Fit – Designed exclusively for the Trident and Trident NP testers. Added Protection – Catches small leaks and spills before they cause damage. Keeps Equipment Clean – Helps maintain a tidy aquarium stand. Durable Build – Made to withstand repeated use and exposure to water. Already Included with Trident NP – Available separately for Trident owners. Compatibility Neptune Systems Trident – Marine Aquarium Water Analyzer Neptune Systems Trident NP – Nitrate & Phosphate Tester What’s Included (1) Neptune Systems Trident Drip Tray

Overview The Neptune Systems FS-100 Replacement Union is a direct replacement fitting designed for use with the FS-100 1" Flow Sensor. Whether you’ve lost a part, damaged an existing fitting, or simply want a backup on hand, this union ensures a secure, leak-free connection for your flow monitoring system. Key Features Direct Replacement – Specifically designed for the Neptune Systems FS-100 1" Flow Sensor. Precision Fit – Provides a reliable, watertight seal. Durable Construction – Built from high-quality materials for long-lasting performance. Single Union – Sold individually (not in pairs). Product Specifications Connection Type: 1" BSPP > 1" Slip Union Compatibility: Neptune Systems FS-100 Flow Sensor Quantity: (1) Single Union What’s Included (1) 1" BSPP > 1" Slip Union

Overview The Neptune Systems A3 Apex Controller System gives aquarists the tools to monitor, protect, and automate their aquariums with ease. With unmatched monitoring capabilities, a powerful Energy Bar 832, and intelligent sensors, the A3 Apex empowers you to prevent problems before they become disasters. Paired with the Apex Fusion cloud app, you can track, control, and customize your aquarium from anywhere in the world. Key Features Unrivaled Control & Monitoring – Tracks temperature, pH, water level, and surface leaks while powering and monitoring equipment. EB832 Energy Hub – Includes 8 individually controlled outlets, 3x 1LINK outputs, and 2x DC24 accessory ports. Each outlet features independent power monitoring. Apex Fusion App – Cloud-based platform with drag-and-drop dashboard customization, equipment setup wizards, and real-time alerts. Critical Safety Features – Prevents overheating, sump overflows, and leaks with included MOS and LD-2 sensors. Expandable Ecosystem – Backwards compatible and customizable with modules and accessories like the Trident, DOS, WAV pumps, and salinity monitoring. Plug & Play Connectivity – Built-in WiFi and Ethernet ensure fast setup and reliable operation. Future-Proof Expandability The A3 Apex isn’t just a controller—it’s the foundation of a growing ecosystem. Add salinity monitoring with the PM2 module, or expand into automated testing with the Trident for Calcium, Alkalinity, and Magnesium. With dozens of modules and accessories available, you can build your Apex system to meet the exact needs of your aquarium now and in the future. What’s Included (1) A3 Apex Base Unit (1) EB832 Energy Bar 832 (1) Temperature Probe (1) pH Probe (1) MOS Magnetic Optical Sensor (1) LD-2 Leak Detection Sensor (1) 6' Aquabus Cable (1) Calibration Solution Set (pH 7 & 10) Mounting Screws Getting Started Card Specifications Head Unit Dimensions: 4.75" L x 5.25" H x 3.25" W Energy Bar 832 Dimensions: 10" L x 6.5" H x 2.25" W Connectivity: WiFi or Ethernet Power Bar Certifications: ETL/UL certified for aquarium use Why You’ll Love It The A3 Apex is more than an aquarium controller—it’s peace of mind. With real-time monitoring, automated safeguards, and cloud connectivity, it helps you maintain stable conditions and protect your investment. Whether you’re at home or away, Apex keeps you connected to your aquarium.