From lighting control to water chemistry, level management to pump regulation – ProfiLux handles it all. Integrated measurement modules for temperature, pH, redox, and conductivity (switchable fresh/saltwater) come standard, alongside connections for level, flow, and leakage sensors as well as 1-10V interfaces.
Also available as Industrial Line Version
Same proven technology and features in an aluminum slide-in housing designed for professional installations. Can be mounted in racks, cabinets, or the optional IP54-rated Industrial Line enclosure for harsh environments.
ProfiLux 4 – The Ultimate Aquarium Controller for Ambitious Aquarists
ProfiLux 4 & 4.1 put you in complete control of your aquarium. Lighting schedules, water parameter measurement and regulation, level management, flow monitoring, pump control – all handled with precision. Integrated modules for temperature, pH, redox, and salinity/conductivity come standard, along with ports for level sensors, flow sensors, leakage detection, and 1-10V interfaces.
Stay connected via the built-in webserver, GHL Connect app, email notifications, or the myGHL cloud service – from anywhere in the world, on any device.
The ProfiLux 4.1 takes connectivity further: in addition to WiFi and USB, it adds a LAN port (Ethernet) and supports OTA firmware updates – wirelessly or via network, no USB required.
Both models are future-proof and easily expandable with Expansion Cards or Expansion Boxes, and available in money-saving Controller Sets.
- Numerous connection options even in the basic configuration, easily expandable at any time
- Plug & Play: No additional costly modules necessary to connect the accessories listed in the below illustration, such as sensors (e.g. pH, temperature, flow, leakage, level), 1-10V devices and others
ProfiLux 4 rear view. See ProfiLux 4.1 rear view further down.
ProfiLux® 4 makes the difference.
Highly accurate measurement and control of all relevant water parameters – with alarm functions, data logging, and more. Unlike conventional test kits, ProfiLux continuously monitors and controls pH, conductivity, redox, temperature, and other parameters in real time.
32-channel* lighting control simulates clouds, storms, moon phases, seasonal changes, sunrises and sunsets with stunning realism. Combined with dimmable GHL lights, it creates natural lighting conditions that promote the species-specific behavior of your animals.
Stay connected to your aquarium from anywhere – via the GHL Connect app, built-in webserver, myGHL cloud service, or PC software GHL Control Center. The ProfiLux 4.1 adds a LAN port for wired network connectivity and supports OTA firmware updates over WiFi or LAN.
Wireless communication can’t match the reliability aquarium control demands. ProfiLux Aquatic Bus (PAB) uses the proven CAN bus system – trusted in automotive and industrial applications – for interference-free, stable communication with Powerbars, Expansion Boxes, and GHL Dosers over cable lengths up to 100 meters (300 feet).
ProfiLux runs ProfiLuxOS – GHL’s own operating system, purpose-built for aquarium control. Unlike general-purpose platforms, ProfiLuxOS is optimized for reliability, real-time response, and long-term stability.
Every ProfiLux comes with lifetime free support and access to GHL’s industry-leading knowledge base, firmware updates, and direct technical assistance. Built to last – and backed to match.
Stay Connected. Everywhere.
Access your ProfiLux from anywhere in the world – smartphone, tablet, or computer, on any platform.
The free GHL Connect platform gives you a unified interface as app, built-in webserver, and myGHL cloud service. Monitor your aquarium remotely, get notified instantly, and make adjustments on the go.
For full desktop control, GHL Control Center provides deep access to all settings and data logging via PC.
No cloud required. GHL Connect, the built-in webserver, and GHL Control Center all work fully locally – on your home network, without an internet connection. Unlike many competitors, GHL never forces you into cloud dependency just to operate your device.
GHL Connect
GHL Connect is a comprehensive platform designed to integrate and manage all GHL devices through a unified interface. Available as an app for iOS and Android, it offers real-time monitoring, customizable dashboards, and multi-device management. Users can access their devices globally via the myGHL cloud service or locally through the device’s web server, ensuring connectivity even during internet outages.
GHL Control Center
GHL Control Center (GCC) is a Windows-based software designed for users who prefer a classic desktop interface. It provides comprehensive configuration options similar to GHL Connect, offering a structured environment for detailed work. Users can connect via LAN, WiFi, USB, or serial interface, and manage tasks like firmware updates, sensor calibration, and illumination settings.
Unmatched Expansion Options
The ProfiLux already covers the most common needs out of the box – but if your setup grows, so can your controller.
The two built-in expansion slots accept a range of Expansion Cards, adding measurement inputs for pH, redox, conductivity, and more. Need even more capacity? The Expansion Box 2 adds five additional slots, connecting seamlessly via PAB.
Upgrade when you need it – without replacing your controller.
ProfiLux Expansion Cards
GHL Advanced Technology offers ProfiLux Expansion Cards, designed to enhance the capabilities of ProfiLux controllers. These cards are compatible with various models, including ProfiLux II, 3, and 4, and the Expansion Box, providing additional measurement inputs and advanced communication interfaces. The cards are easy to install, allowing for customized configurations while maintaining the compact design of the devices.
ProfiLux Expansion Box 2
ProfiLux Expansion Box 2, a product designed to enhance the capabilities of the ProfiLux aquarium controller system. It offers increased capacity for expansion cards, enhanced connectivity for additional sensors and accessories, and reliable communication through PAB connectivity. The Expansion Box 2 is presented as a versatile and customizable solution for advanced aquarium setups, allowing seamless integration and configuration.
ProfiLux OS – Maximum Safety and Stability
ProfiLux runs ProfiLuxOS – GHL’s own operating system, purpose-built for aquarium control.
While general-purpose operating systems are designed for broad use cases, they cannot deliver the real-time responsiveness and reliability that a living aquarium demands.
ProfiLuxOS was built from the ground up with one goal: keeping your aquarium safe.
The result is a lean, robust, and future-proof OS that prioritizes stability and precise control – 24 hours a day, 7 days a week.
ProfiLux Accessories – The Perfect Addition
Every aquarium is different – and ProfiLux grows with yours. Expand your setup with Expansion Cards, Expansion Boxes, probes and sensors, dimmable LED lights and lightbars, stream and flow pumps, automatic fish feeders, and much more.
Take it further with GHL’s precision ecosystem: the GHL Doser for automated dosing, the KH Director® for continuous alkalinity monitoring and control, or the ION Director® for calcium and magnesium tracking – all seamlessly integrated with your ProfiLux.
As your ambitions grow, ProfiLux grows with you.
Mitras Lightbar 3
Mitras Lightbar 3 is a modular LED lighting system for freshwater and marine aquariums, available in lengths from 40 to 200 cm in 10 cm steps. Seven separately adjustable color channels across five LED setups cover everything from planted freshwater to coral reef and refugium. Connected to a ProfiLux controller, it dims per channel and runs simulations such as sunrise, moonlight and cloud cover.
GHL Sensors
GHL Sensors offer high-quality monitoring solutions for ProfiLux-controlled aquariums, ensuring precise and reliable measurements. Featuring laboratory-grade quality, these sensors include durable double junction probes for pH and ORP, extra-long cables for flexibility, and galvanically isolated designs to prevent interference. Suitable for both hobbyists and professionals, they support comprehensive environmental monitoring for aquatic life.
Powerbars
ProfiLux Powerbars are engineered for reliable power management in ProfiLux-controlled aquariums, offering seamless integration and automation of essential devices. Each unit connects via the ProfiLux Aquatic Bus (PAB) for interference-free communication. Key features include six individually switchable sockets, robust industrial relays, current monitoring, and an illuminated system status indicator for optimal safety and functionality.
Aquarium Fans
The GHL PropellerBreeze 3 aquarium fans provide efficient cooling through evaporative heat loss, featuring durable, silent 85 mm fans. These units, made from powder-coated aluminum, offer universal adjustable mounting for glass up to 21 mm thick. Equipped with a universal power supply and integrated switch, they ensure easy operation. Speed control is available via the ProfiLux controller using PropellerControl, which adjusts fan speed based on water temperature.
Pumps
Versia® Flow and Stream pumps by GHL deliver advanced flow management for aquariums, offering precision and flexibility for both marine and freshwater systems. These pumps, powered by brushless 24V DC motors, ensure quiet, energy-efficient operation. The Versia® Controller, when integrated with a ProfiLux® aquarium computer, enables detailed control over flow patterns, speed profiles, and maintenance modes.
ProfiLux 4Â features at a glance
- 32 channel illumination control
- simulation: clouds, thunderstorm, seasonal lighting, lunar cycle, sunrise
- pH value
- water temperature
- redox / ORP
- salinity / conductivity
- dis. oxygen*
- KH / alkalinity*
- Ca / Mg / Ka / Na / NO3*
- voltage*
- humidity*
- air temperature*
- water flow
- visual and acoustic alarm
- 16 channel stream and return pump control
- 32 channel dosing pump control
- max. 12 level-, flow, and leakage sensors
- automatic water changes and top off
- leakage detection
- 4 fish feeders
- variable feeding times and amounts
- 32 universal timers
- switch outlets, start actions
- app GHL Connect
- cloudservice myGHL
- webinterface
- desktop software
- WiFi
- LAN (only ProfiLux 4.1)
- USB
- 2x PAB-ports
- 3x L-ports (4x 1-10V interfaces)
- 2x S-port (8x switchable outlets)
- 1x Mitras Lightbar port
- 2x ports for 4x level, leakage and flow
- 1x port for DCF or automatic feeder
- 1x AUX port (4 digital and analog I/Os)
- 1x LinMon-port (power failure detection)
- water temperature sensor included
W x D x H: 220 x 150 x 55 mm / 8.66″ x 5.91″ x 2.17″
ProfiLux 4.1 rear view
ProfiLux® is Future-Proof.
Since 1998, the ProfiLux Controller has been the powerful heart and brain of a well-engineered modular system developed and produced in Germany. Though the years, it has proven itself to be a most reliable means of aquarium control. For that reason, it has earned a spot as the most globally recognized aquarium controller earning various awards for its degree of reliability and accuracy. To this day, this modular system continues to grow.Rest assured, ProfiLux 4 is ready for the future.
*) some features may require additional accessories
Last updated on: August 27, 2026