Smart Salinity Monitoring and Aquarium Automation

The HYDROS Control X3-S is a compact yet powerful aquarium controller designed specifically for saltwater aquariums. Built around conductivity and salinity monitoring, the X3-S gives reef hobbyists precise control over essential equipment while providing real-time alerts and monitoring through the intuitive HYDROS app.

Whether you're building your first automated reef or expanding an existing HYDROS collective, the Control X3-S delivers industrial-grade reliability in a compact, IP65-rated controller. Monitor salinity, temperature, water levels, leaks, and more while automating pumps, lighting, feeders, and other critical equipment—all from your smartphone.

Features

Designed specifically for saltwater aquariums
Dedicated Salinity (Conductivity) Probe Port
2 HYDROS Sense Ports
2 Command Bus ports for expanding your HYDROS Collective
Real-time alerts and push notifications
Cloud-based control from anywhere
Local Wi-Fi control without internet
Fast dual-core 32-bit processor
IP65 splash-resistant enclosure
Aircraft-style waterproof connectors
Expandable with additional HYDROS controllers
Built-in Safety Net architecture with no single point of failure
Engineered, assembled, and supported in the USA

Monitor Your Aquarium

The HYDROS Control X3-S can monitor:

Salinity (Conductivity)
Temperature
Water Level
Leak Detection
Flow Sensors
Magnetic Switches
Push Button Inputs
Additional HYDROS Sense accessories

Create custom automation rules that notify you immediately if your aquarium experiences abnormal conditions, helping protect your livestock 24/7.

Expand Your HYDROS System

The X3-S works perfectly as a standalone controller or as part of a larger HYDROS Collective.

Compatible with:

XP8 Power Bar
WaveEngine
X4
X10
Kraken
Maven
Minnow
Drive Port Accessories
Additional HYDROS Controllers and Accessories

Specifications

Dual-Core 32-Bit Processor
2 HYDROS Sense Ports
1 Dedicated Salinity Probe Port
2 Command Bus Ports
IP65 Splash-Proof Enclosure
Cloud and Local Wi-Fi Connectivity
Dimensions: 5" × 2.7" × 2.3"

What's Included

HYDROS Control X3-S Controller
Mounting Hardware
Quick Start Guide

Please Note: Salinity probe, temperature probe, power supply, and other accessories may be sold separately depending on the package purchased. Verify package contents before ordering.

Why Choose the HYDROS Control X3-S?

The Control X3-S is the ideal controller for reef keepers who want accurate salinity monitoring while building a flexible automation system that can grow alongside their aquarium. Unlike many controllers that require costly expansion modules, every HYDROS controller functions as an intelligent device capable of working independently or as part of a larger system.

Its dedicated conductivity monitoring, industrial-grade reliability, and expandable design make it an excellent choice for reef hobbyists seeking dependable aquarium automation.

Shipping Information

FREE Standard Shipping

This item qualifies for FREE Standard Shipping within the contiguous United States.

FREE Standard Shipping
Processing Time: 1–3 Business Days
Estimated Delivery: 3–7 Business Days
Securely packaged for safe delivery
Tracking information will be emailed once your order ships

Why Shop with Infinity and Beyond Aquatics?

At Infinity and Beyond Aquatics, we understand that reliable equipment is the foundation of every successful aquarium. That's why we offer trusted brands, competitive pricing, and customer support backed by real reef-keeping experience.

When you shop with us, you'll enjoy: