Power your aquarium’s circulation with the intelligent, efficient, and highly controllable Neptune Systems COR-20 Return Pump.

The COR-20 is a variable-speed, brushless DC centrifugal pump capable of producing up to 2,000 GPH while consuming no more than approximately 90 watts. It can be installed internally or externally and includes multiple plumbing fittings for integration with a variety of aquarium systems.

An Apex controller is not required. The included COR-20 driver and external power supply allow the pump to operate independently with onboard speed and feed-mode controls. Connecting the COR-20 to a compatible Neptune Systems Apex through AquaBus unlocks advanced programming, remote monitoring, operational feedback, alerts, and integration with other aquarium equipment.

IMPORTANT COMPATIBILITY INFORMATION

The Neptune Systems COR-20 can operate as a standalone return pump and includes its own driver and 100-watt power supply.

A Neptune Systems Apex controller is optional and is only required for advanced Apex Fusion control, remote monitoring, alerts, and aquarium automation.

KEY FEATURES

• Maximum flow of approximately 2,000 GPH
• Maximum head pressure of approximately 20 feet
• Variable-speed brushless DC motor
• Operates independently without an Apex controller
• Connects to compatible Apex systems through AquaBus
• Suitable for internal or external installation
• IQ-Level minimum and maximum speed configuration
• Programmable feed mode
• Obstruction detection
• Internal motor-temperature monitoring
• Automatic speed reduction during unsafe temperature conditions
• Visual status and error indicators
• Remote alerts when connected to Apex Fusion
• Energy-efficient operation using up to approximately 90 watts
• Quiet, low-vibration operation
• Multiple plumbing fittings included
• Suitable for freshwater, saltwater, and reef aquariums

STANDALONE OPERATION

The COR-20 includes its own controller and external power supply, allowing it to operate without an Apex system.

The onboard driver provides basic control over pump speed and feed mode. This makes the COR-20 suitable for customers who want a premium controllable return pump today while retaining the option to add Apex integration later.

APEX INTEGRATION

Connecting the COR-20 driver to a compatible Apex system through AquaBus unlocks additional monitoring and control through Apex Fusion.

Depending on your Apex configuration and programming, you can:

• Adjust pump output remotely
• Incorporate the pump into feed modes
• Create maintenance routines
• Monitor operational status
• Receive obstruction and temperature alerts
• Coordinate the pump with water-level sensors
• Create customized minimum and maximum operating speeds
• Integrate the return pump with other Apex-controlled equipment

IQ-LEVEL TECHNOLOGY

IQ-Level allows the minimum and maximum pump-output settings to be customized for your aquarium and plumbing.

After configuration, the pump’s operating range can be adjusted without accidentally exceeding the practical flow limits of the aquarium or dropping below the minimum flow required during feed modes.

OBSTRUCTION DETECTION

Snails, debris, filter material, and mineral buildup can obstruct a return pump or its plumbing.

If the COR-20 detects a significant obstruction, the driver provides a visual alert. When connected to an Apex system with internet access, the pump can also send an alert through Apex Fusion.

INTERNAL TEMPERATURE MONITORING

The COR-20 continually monitors the internal temperature of its motor.

If the motor reaches an unsafe temperature, the driver can reduce pump speed to bring the temperature back within an acceptable range. When connected to Apex Fusion, the system can also provide a notification so the issue can be investigated.

INTERNAL OR EXTERNAL INSTALLATION

The COR-20 is designed for either submerged installation inside a sump or external installation in an appropriate return-pump configuration.

The pump is not self-priming. External installations must be positioned and plumbed so the pump remains properly flooded during operation.

FLOW AND PERFORMANCE

• Maximum Flow: Approximately 2,000 GPH
• Maximum Head Pressure: Approximately 20 feet
• Maximum Power Consumption: Approximately 90 watts
• Motor Type: Variable-speed brushless DC centrifugal pump
• Installation: Internal or external
• Control: Included driver with optional Apex integration

Actual flow depends on plumbing diameter, vertical rise, fittings, valves, restrictions, and other system conditions.

For maximum performance, Neptune Systems recommends using the largest practical plumbing diameter. The included 1.25-inch union provides the least restrictive output option.

PUMP DIMENSIONS

Approximately:

• 3.875 inches wide
• 4.875 inches high
• 6.25 inches deep

DRIVER DIMENSIONS

Approximately:

• 3 inches wide
• 4 inches high
• 1 inch deep

PLUMBING CONNECTIONS

• Intake: 1-inch slip PVC
• Output: 3/4-inch slip PVC or included 1.25-inch slip-to-BSPP union
• Additional 1-inch slip fitting included

Always verify plumbing compatibility and required fittings before installation.

WHAT’S INCLUDED

• Neptune Systems COR-20 pump body
• COR-20 driver/controller
• 100-watt 24V DC power supply
• Power cord
• AquaBus cable
• 1.25-inch PVC slip-to-BSPP union
• 1-inch slip fitting
• 3/4-inch slip fitting

INSTALLATION REQUIREMENTS

• Appropriate aquarium return plumbing
• Properly sized PVC, flexible tubing, unions, valves, or adapters as required
• Dry, protected mounting location for the driver and power supply
• Compatible Neptune Systems Apex controller for optional Apex Fusion features

IMPORTANT INSTALLATION INFORMATION

The COR-20 is not self-priming. Confirm that the pump is properly flooded before operation when installed externally.

Never allow the pump to operate dry. Use properly installed unions and valves so the pump can be safely removed for inspection and cleaning.

Mount the driver and power supply in a dry, ventilated location protected from leaks, splashes, salt spray, and condensation. Install drip loops on all electrical cables and use properly grounded, GFCI-protected electrical circuits.

Regularly inspect and clean the pump, impeller, intake, output, and plumbing to remove mineral buildup and debris.

WHY BUY FROM US?

Infinity and Beyond Aquatics supplies trusted aquarium equipment for freshwater, saltwater, and reef systems. Every order is carefully processed, securely packaged, and supported by knowledgeable aquarium service.

SHIPPING INFORMATION