HYDROS Duet – Dual Continuous-Duty Dosing Pump & Aquarium Controller

Take aquarium automation to the next level with the HYDROS Duet, a powerful combination of two high-performance dosing pumps and a smart aquarium controller. Designed for both saltwater and freshwater aquariums, the Duet delivers precise fluid management for everything from automatic water changes to calcium reactor control, kalkwasser dosing, and nutrient supplementation.

Unlike traditional dosing systems intended for small daily additions, the HYDROS Duet features two continuous-duty stepper motor pumps, each capable of adjustable flow rates from 0.1 to 600 mL/min. Both pumps support reversible operation, making it easy to configure automated drain-and-fill systems or other advanced aquarium applications.

With built-in WiFi, four Sense Ports, and seamless integration with the HYDROS ecosystem, the Duet puts sophisticated aquarium control at your fingertips without complicated programming.

Key Features

• Dual Continuous-Duty Dosing Pumps: Two independently controllable stepper motor pumps designed for extended operation and high-volume dosing applications.

• Wide Flow Range: Adjustable dosing speeds from 0.1 to 600 mL/min per pump for both precision dosing and high-volume fluid transfer.

• Reversible Pump Operation: Run either pump forward or backward for flexible plumbing configurations and automatic water changes.

• Smart App Control: Monitor, schedule, and adjust operations remotely through the HYDROS app for iOS and Android.

• Four Sense Ports: Connect compatible temperature probes, water level sensors, leak detectors, flow sensors, and other HYDROS accessories.

• One 12V Drive Port: Control compatible accessories such as ATO pumps, fans, solenoids, and cabinet lighting.

• Two Command Bus Ports: Expand your system by connecting additional HYDROS controllers and compatible devices.

• Built for Aquarium Environments: IP65-rated splash-resistant enclosure and durable aircraft-style connectors.

• Flexible System Integration: Operates independently or as part of a larger HYDROS collective.

• User-Serviceable Pump Components: Replaceable Pharmed tubing and pump head components make routine maintenance straightforward.

Ideal Applications

Automatic Water Changes

Automate water removal and replacement using the Duet's two continuous-duty pumps. Reversible operation, adjustable flow rates, and optional level sensors provide flexibility for creating a water change system tailored to your aquarium.

Calcium & Kalkwasser Reactor Control

Precisely regulate calcium reactor effluent or kalkwasser delivery with programmable flow rates. The Duet's continuous-duty design makes it particularly useful for applications requiring extended, consistent operation.

Liquid Food & Supplement Dosing

Schedule controlled additions of liquid foods, amino acids, and other aquarium supplements with adjustable dosing rates and convenient app-based management.

Advanced Aquarium Automation

Connect compatible HYDROS sensors to monitor water levels, detect leaks, and create automated responses. Expand the system with additional HYDROS equipment to manage more of your aquarium from one platform.

Smart Control with the HYDROS App

The HYDROS Duet makes sophisticated aquarium automation accessible through an intuitive app-based interface. Create custom schedules, monitor equipment, configure alerts, and receive notifications directly on your smartphone.

Its dual-core processor executes control functions locally, allowing configured operations to continue without relying on a constant internet connection. Remote monitoring and cloud-based features are available when connected to the internet.

The Duet can serve as a standalone dosing controller or become part of a comprehensive HYDROS aquarium management system.

Technical Specifications

What's Included

• HYDROS Duet controller with two integrated dosing pumps

• Power supply

Important: Sensors, probes, and additional HYDROS accessories are sold separately. Controlling AC-powered equipment such as heaters, lights, and return pumps requires a compatible HYDROS outlet-control device, such as an XP8, Smart Plug, or WiFi Power Strip (not included).

Why Choose the HYDROS Duet?

The HYDROS Duet brings together high-volume dosing performance, smart monitoring, and expandable aquarium control in one versatile device. Whether you're automating water changes on a large reef aquarium, managing reactor effluent, or building a fully integrated aquarium control system, the Duet provides the precision and flexibility needed for demanding aquatic applications.

Available at Lush Corals — your source for HYDROS aquarium controllers, dosing equipment, and reef automation solutions.