Our core products. Take your pick.
Experience proven and unmatched reliability, precision and safety: Designed by professionals for professionals, proudly made in Germany.
GHL makes the difference.
Legendary Reliability
Your aquarium is a living system that runs around the clock — and the technology behind it must work reliably. Every GHL device is engineered, tested and built to the highest standards, without compromise. Reliability isn’t a feature — it’s the foundation. Developed and made in Germany.
Standalone or in a System
Every device is fully functional on its own. As your needs grow, add further devices and integrate them into a system that handles almost everything: lighting, dosing and measurement, all in one homogeneous setup. Add more whenever you like — your system expands step by step, without limits.
Always a Step Ahead
GHL has shaped aquarium technology for decades. GHL’s award-winning products have set many standards: versatile multifunctional controllers, precise dosing systems and high-end lighting solutions. The result of consistent evolution: technology trusted by professionals and hobbyists alike.
Our Mission
Simplifying Aquatics Through Innovation and Quality
Since 1998, GHL has been driven by a clear mission: to make aquatics easier, safer, and more successful for everyone. We achieve this through cutting-edge, high-quality products designed with reliability and precision.
With a relentless focus on innovation and craftsmanship, GHL has grown into one of the world’s leading manufacturers in the industry. For over 25 years, our aquarium controllers, dosing systems, and LED aquarium lighting solutions have been trusted and celebrated by passionate aquarists worldwide, empowering them to achieve success in every aspect of their aquatic journey.
Thank you for being part of this exciting journey with us!
News. Stay up to date.
What’s going on here? The answer and the draw
In early October our security service reported suspicious observations: our company building in Kaiserslautern was glowing a striking blue at night. We asked you what was going on, and many of you sent in an answer. Thank you to everyone who took part. Here are the three options again, the answer, and the draw. The three options A) The first working fusion reactor Clean energy for the whole of Kaiserslautern, straight from the foyer. B) 24/7 endurance test of 3 × Mitras LX8 Three luminaires, continuous operation, one very bright foyer. C) A new type of rocket propulsion The foyer does look like a launch pad at night. The answer B) 24/7 endurance test of 3 × Mitras LX8 Three Mitras LX8 are running in the foyer of our building, day and night. An endurance test like this proves hardware and firmware under real operating conditions before deliveries begin. The…
Why your luminaire should speak your controller’s language
The ProfiLux aquarium controller and Mitras LX8 LED luminaire form a fully integrated system with digital, wireless communication. ProfiLux manages all aquarium functions—including lighting, pumps, and dosing—from one interface, sending synchronized lighting programs and status data to each Mitras LX8. Alerts appear via the luminaire’s Ambient Glow, allowing seamless coordination without separate apps or controls.
Moonlight in the Aquarium – Simulating the Lunar Cycle
Moonlight in the aquarium: why the lunar cycle matters — and how every GHL luminaire reproduces it Reef life follows the moon. Most aquariums ignore it: the night light, if there is one, is the same every night. Here is why the lunar cycle is worth reproducing, and how it works with every GHL luminaire. Why the moon matters underwater Once a year, in their spawning season, many stony corals release their gametes in the same few nights — often a few nights after a full moon. Numerous reef fish, crustaceans and polychaete worms show the same lunar periodicity in their reproduction. Recent research indicates that an important cue may not simply be the full moon itself, but the sequence of light and darkness around it, including the dark hours between sunset and moonrise in the nights that follow. Moonlight also shapes nocturnal life in a less obvious way: visually…
Enjoy Your Passion…
GHL Takes Care of the Rest.
Last updated on: June 7, 2026