Hydros Duet Dosing Pump & Aquarium Controller - Hydros

HYDROS Duet Super-Duty Dosing & Control System

The HYDROS Duet is built for reef keepers who need more than a standard dosing pump. Combining two high-performance stepper-driven dosing pumps with intelligent HYDROS automation, the Duet gives you precise control over high-demand aquarium tasks like automated water changes, calcium reactor effluent management, kalkwasser dosing, and more.

Designed as both a heavy-duty doser and a HYDROS controller, the Duet helps simplify complex aquarium maintenance while adding an extra layer of monitoring and system protection. Whether you are maintaining a growing SPS reef or building a fully automated system, the Duet delivers the reliability and flexibility needed for long-term stability.

High-Performance Stepper Motor Dosing

Unlike traditional hobby-grade dosing pumps, the HYDROS Duet uses industrial-style stepper motors designed for continuous operation and consistent flow control. Each pump can handle flow rates from 0.1 to 500 mL/min, allowing you to precisely dose small additives or move larger volumes of water for automated water changes.

The dual-pump configuration makes it ideal for:

• Automated water changes (AWC)
• Calcium reactor effluent control
• Kalkwasser dosing
• Liquid food dosing
• Sulfur reactor applications
• Continuous fluid transfer tasks

Smart Aquarium Monitoring & Automation

The Duet is more than just a dosing system. As part of the HYDROS ecosystem, it can actively monitor your aquarium and respond to changing conditions in real time.

With 4 Sense Ports, you can connect accessories such as:

• Temperature probes
• Optical water level sensors
• Leak detectors
• Flow sensors

The integrated Drive Port allows direct control of 12V accessories like ATO pumps, cooling fans, and cabinet lighting without needing additional controllers.

Expand Your HYDROS Ecosystem

Two HYDROS Command Bus ports allow the Duet to connect with other HYDROS devices such as the Control X10 or XP8. This creates a synchronized, fail-safe control network where devices can share power, monitoring data, and automation logic across your entire system.

As your reef grows, the HYDROS platform grows with it.

Built for Real Reef Tank Conditions

Aquarium equipment lives in harsh environments filled with salt spray, humidity, and heat. The HYDROS Duet is designed with a splash-proof and dust-resistant enclosure to help withstand daily sump cabinet conditions.

Aircraft-style connectors provide secure, corrosion-resistant connections that help maintain reliable communication and power delivery over time.

Easy Setup with the HYDROS App

Programming the Duet does not require coding experience. The HYDROS app provides a simple drag-and-drop interface that allows you to create schedules, automation rules, alerts, and safety backups directly from your phone or tablet.

Monitor your aquarium remotely and receive instant push notifications if leaks are detected or parameters move outside of your desired range.

HYDROS Duet Features

• Dual super-duty stepper motor dosing pumps
• Adjustable flow rates from 0.1–500 mL/min
• Ideal for automated water changes and calcium reactors
• 4 Sense Ports for monitoring accessories
• 1 Drive Port for 12V accessory control
• HYDROS Command Bus connectivity
• WiFi-enabled cloud-based control
• Splash-proof and dust-resistant enclosure
• Simple app-based setup and automation

Product Specifications

• Dimensions: 10.75" x 6" x 5.875"
• Pump Speed: 0.1 to 500 mL/min
• Connectivity: WiFi & HYDROS Command Bus
• Ports:
  • 4x Sense Ports
  • 1x Drive Port
  • 2x Command Bus Ports

What’s Included

• HYDROS Duet Controller
• Power Supply
• Barbed Fittings for Tubing Connections