Your Path to Success with ProfiLux.

Having a ProfiLux Aquarium Controller operating and monitoring your aquarium, terrarium, or pond, can give you peace of mind. With ProfiLux, your aquatic environment is in the hands of reliable technology.

The ProfiLux Controller has been the powerful heart and brain of a well-engineered modular system that has been growing since 1998. GHL provides the tools for all your maintenance tasks for whatever functions you want to control, monitor, or automate in your aquarium, terrarium or pond.

Professional and Safe.

The ProfiLux Aquarium Controller is built to make your hobby more enjoyable. We are hobbyists just like you and we know very well about the work involved in maintaining an aquarium, terrarium, and pond. Weekly water changes, monthly water testing, daily dosing, setting reminders, topping off, the list goes on and on. Wouldn’t it be great if you could spend less time working on your tank and more time enjoying it? There’s no need to wish because ProfiLux can make it happen!

You already know what a ProfiLux controller has to offer, just not sure which model to chose? Take the short cut to the ProfiLux Models Comparison Chart.

Why ProfiLux®:


Highly accurate measurement and control of all relevant water parameters, with alarm function*, data logging*, etc.

Unlike, conventional test kits which are time consuming, ProfiLux can continuously monitor and control parameters such as pH, conductivity, redox, temp, etc.*

(*Depending on the chosen model)


32channel* lighting control for most life-like simulation of clouds, storm, moon phases, seasonal lighting, sunrises and sunsets.

The realistic lighting control, together with the dimmable lights from GHL, ensures natural lighting and thus promotes the species-specific behavior of your animals.

(*Depending on the chosen model)

PC-Software & App by GHL

Unmatched connectivity options. So you can keep track of all your set-ups, even when having various aquariums, terrariums or ponds.

Get connected with your GHL Device via our universal and platform independent user interface GHL Connect, with App, Cloud Service myGHL*, Webserver* or/and PC software GHL Control Center.

The choice is yours.

(*Depending on the chosen model)


Professional CAN bus system for reliable and interference-free networking of all network devices, such as ProfiLux Controllers*, Powerbars, Expansion boxes, GHL Dosers 2. Connect devices to each other with PAB cables up to 100 m (300 ft.) apart.

(*from ProfiLux 3)


More safety through GHL´s own and unique for aquarium use specialized operating system, ProfiLuxOS.



Reliable support in technical matters by the GHL Support Forum with large user base.

1000 Possibilites to take Benefit from –  ProfiLux® in Detail.

The ProfiLux Controller is recognized worldwide for its outstanding accuracy and reliability.

From private users to research institutions, they all trust in the ProfiLux to provide them with highly accurate data and performance. The exceptional functionality of ProfiLux makes it the preferred controller of professionals and hobbyists alike.

ProfiLux 4, black

Multichannel Lighting Control

  • Up to 32 independent channels of dimmable and non-dimmable lamps
  • Freely adjustable
  • True calendar moon phase: Simulates the lunar rhythm in harmony with nature and promotes species-typical behavior.
  • Sunrise and sunset
  • Seasonal lighting: ProfiLux Aquarium (beginning with version 3) Controllers are capable of simulating the seasonal cycle of sunshine duration and sun intensity >Learn More
  • Thunderstorms: In conjunction with dimmable GHL lights a thunderstorm with lightnings is simulated. Adjustable storm parameters determine frequency, intensity and duration.
  • Rainy days
  • Clouds: Adjustable random generators define the beginning, intensity, duration and speed of a cloud so each time new clouds are created.
  • Temperature-dependent light reduction for short-term temperature peaks on hot summer days.
  • Tropical twilight
  • Gentle switching from summer time to winter time laid out on several days.
  • PWM interface for LEDs

Accurate Measuring and Controlling

  • Water temperature control: For heater, ground heater and cooling; Nightly setback can be programmed; intelligent summer circuit for optional ground heating.
  • Menu guided calibration of all sensors and probes.
  • pH control: Up and down regulation (via CO2-addition (downwards) or via alkalisation (upwards)), programmable nightly decrease.
  • Redox-Potential
  • Conductivity (Salinity)
  • Oxygen
  • Humidity
  • Air temperature
  • Galvanic isolation of all sensor inputs
  • Operation hour meter for all sensors
  • Sick fish therapy program:
    In some fish diseases, it is necessary to convert the water temperature. ProfiLux slowly lowers the temperature.The normal temperature will be setted back to normal automatically by the device after an adjustable time.
  • Universal analog and digital inputs
  • Level (level, leakage, automatic water change etc.)
  • Flow (stream)
  • Data log

Versatile Pump Controlling

  • Up to 16 stream pumps independently controllable
  • Several modes (high/low tide, surge, random and much more)
  • Variable wave duration (0,4 s…-60s in 10 ms steps)
  • Random wave length and intensity possible
  • Different wave modes (sine wave, square wave, square wave short)
  • Nightly decrease
  • Thunderstorms mode
  • Behavior while feeding pause
  • Pumps of the following different manufacturers can be connected (Tunze®, Hydor Koralia®, Abbyzz®, Royal Exclusiv)

Uppermost Safety

  • Monitoring and control of all water values
  • Acoustic and visual alarm
  • Specialized, efficient, and robust operating system ProfiLuxOS
  • All settings are stored in a non-volatile storage (FRAM), a power failure will not cause data loss.
  • Battery buffered real time clock (RTC)
  • Programmable memory texts
  • Child protection with PIN code
  • ProfiLux Aquatic Bus: Fail-safe CAN bus system for data transfer
  • Alarm triggered SMS-notification
  • Alarm triggered Email-notification
  • Redundant Sensors as backup for fail safe operation
  • Time monitoring during sensitive operations

Several PC-Interfaces

  • RS232
  • Wifi/LAN
  • USB

Rock-Solid Hardware

  • All controllers have high-quality and highly energy efficient grounded power supplies.
  • The outlets in our Powerbars can switch high currents and critical loads by using a special relay (16A at 230V or 16A 115V).
  • Each socket is switched independently.
  • Parts consist of flame retardant components..
  • Our durable sensors are manufactured in Germany and meet laboratory standards.
  • Only components from renowned manufacturers are used exclusively.

Wide Range of Expansion

and much more...

  • Several Controllers can be networked.
  • Dosing pump control
  • Control PropellerBreeze (adjustable aquarium radiator)
  • Timers
  • Automatic waterchange
  • Maintenance program: Shutdown of consumers during the cleaning and maintenance, dimming down the lighting etc.
  • Customizable reminders
  • Therapy program
  • PIN-Protection
  • Operating hours meter
  • Feeding pause
  • Burning-in mode for fluorescent tubes
  • Power-up delay after power failure
  • Programmable Logic

The operation of ProfiLux is very easy:

First time setup is simple. No technical programming skills are required and our interactive dialogues make operations efficient and intuitive.

The ProfiLux provides – depending on the model – a vast selection of preset settings, simulation programs, remote control and monitoring of countless devices, level control, pump control, Auto Top-off, advanced LED dimming, data acquisition and storage, programmable logic, and much, much more.

Learn more about how the ProfiLux Controller works here.


Specialized for You. Choose the ProfiLux Controller that Meets Your Needs.

Choose among different types of controllers the one that fit your needs best. For applications in the outdoor area (pond or swimming pool) we offer the specially designed Outdoor 3 Controller. ProfiLux 3 and ProfiLux 4 are easily expandable with Expansion Cards or Expansion Boxes and can be customized to suit your needs.

ProfiLux Light (WiFi)

The Professional Lighting Control with many Smart Extra Functions. Buy now Achieving natural lighting conditions in your aquarium has never been easier. The compact aquarium controller Profilux Light offers many familiar features found in the proven high-end ProfiLux 3 and 4 series, all at an attractive price. ProfiLux Light can control dimmable and non dimmable lighting,…

Focused on the Essentials. For Your Success in the Aquarium Hobby. Compact and Reliable: The aquarium controller Profilux Mini offers many familiar features found in the proven high-end ProfiLux 3 and 4 series, all at an attractive price. ProfiLux Mini measures and controls temperature and pH-value and can control dimmable and non dimmable lighting, variable…

ProfiLux 4e

The “e” in ProfiLux 4e stands for essential. The ProfiLux 4e features the same high degree of quality and reliability as the flagship ProfiLux 4. With ProfiLux 4e, users who do not – or not immediately – need all the features of ProfiLux 4 are offered a more affordable alternative to ProfiLux 4 without sacrificing…

ProfiLux 4

The ProfiLux® aquarium controller offers everything the ambitious aquarist needs to achieve success. From form to function, the ProfiLux 4 is well-equipped to manage important tasks such as lighting control, water parameter measurement/control, level control, flow measurement, pump control, and much more. Fitted with the most on-board connections available, the P4 also includes integrated modules for measuring Conductance (adjustable: fresh or…

ProfiLux Controller Sets

You want to start right away? Then our controller sets are a convenient solution for you. The sets contain matching components at a very attractive price. They offer a price advantage of up to 20% compared to the single purchase. The exact product description of the individual ProfiLux aquarium controller models can be found here.…

ProfiLux Models Comparison Chart

Controller ModelProfiLux Light (WiFi)ProfiLux Mini (WiFi)ProfiLux 4eProfiLux 4
Illumination Channels24243232
1-10 V Interfaces446 (optional 30)6 (optional 30)
Mitras Lightbar Interface
ProfiLux Aquatic Bus (PAB)--
AUX port--
DCF Receiver port--
GHL Control Pad port--
Power failure monitor port--
Controllable sockets446464
Expansion slots--3 (1x internal)3 (1x internal)
Dosing Pump Control√ (via switchable socket)√ (via switchable socket)
Stream Pump Control
USB / RS232√ / -√ / -√ / √ (at Mitras LB int.)√ / √ (at Mitras LB int.)
WiFi / LANWiFi-version only / -WiFi-version only / -√ / -√ / -
Webserver / Email ClientWiFi-version only / -WiFi-version only / -√ / √√ / √
Cloudservice myGHLWiFi-version onlyWiFi-version only
Alarm-visually / acousticallyvisually / acousticallyvisually / acoustically
Water Temperature-
Redox / ORP- -
Conductivity- - optional
Oxygen- - optionaloptional
Relative Humidity- - optionaloptional
Air Temperature- - optionaloptional
KH / Alkalinity- - optionaloptional
Inputs Level Sensors / Flow Sensors / Leakage Detectors3 (WiFi-version only) *3 (WiFi-version only) *4 (optional 16)4 (optional 16)
Digital outputs / Switch channels44optional 648 (optional 64)
Operating SystemProfiLuxOSProfiLuxOSProfiLuxOSProfiLuxOS
Sensors included-Water TemperatureWater TemperatureWater Temperature

*) adapter required, see details on respective product page

For years, customers around the world have relied on the safety of the ProfiLux Aquarium Controller. Are you ready to join them?

Light Dimming, pH-and Temperature Control were already the main features of the ProfiLux Computer in 1998. The controller was built from scratch and originally designed for private use to increase the safety and convenience of fish keeping. Soon enough, it was made clear to GHL that the outstanding performance and reliability of the prototype needed to be put into production to benefit aquarium hobbyists!

Countless features have been added since then to the latest ProfiLux 4 Model. The functionality of the computer is unmatched. Measurement and control of Salinity and Redox, Stream Pump Control or Weather Simulation Programs, user-friendly web interface, free control software and App GHL Connect, cloud service my GHL, etc. The list of features is continuously growing thanks to our enthusiastic customers from around the world. We listen to the needs of our customers and develop products around those desires.

2010 Customers of Germany elected the ProfiLux II Controller Product of the Year.

The consistent development of the ProfiLux Controller guarantees that it always will be a worthy piece of state-of-the-art-technology for now and in the future.

The highlight of that short story of success surely was the honor of winning several awards. We have won on two counts, “The Innovation Award” donated from the government of the German federal state Rhineland-Pfalz: The first time in 2005, for the controller itself, and the second time in 2013 for the whole ProfiLux System for Aquariums, Terrariums and Ponds.

ProfiLux Product of the Year