Our mission. Make aquatics easier and safer with reliable technology.

Since its foundation in 1998, GHL has pursued a clear goal: we want to make aquatics easier, safer and more successful for everyone by providing reliable high-tech products of the highest quality. Our continuous innovation and attention to detail has made us one of the world’s leading manufacturers in this field. Our aquarium controllers, dosers and LED aquarium illumination have been appreciated and used by a passionate community around the world for over 25 years.
Thank you for joining us on this exciting journey.

Matthias Gross

Matthias Gross

Founder GHL

What our customers say.

Congratulations to Your IOND!

I would like to congratulate you on your product (Ion Director ), I hope it will continue be so accurate in the long term, send my best wishes to everyone.

Béla S.

Mitras Lightbar 3: Beautiful Light and High Performance

I would like to thank you once again for the great Mitras Lightbar 3 lamps. They provide a very beautiful and uniform light. A check with a light meter has shown that the lamps perform significantly better with the same power consumption as the previous ones.
That’s why I’ve dropped the original plan to use combination lighting for the new tank and only want to work with the MLB 3 lamps.

Jasper C.

Mitras LX7504 Coral Pop

Everything is excellent.
I really must say that I am very satisfied with these superb lights.

Andreas J.

Thanks for the fast help

Thank you for your fast and reliable help – I am always pleased to have chosen the right product and will recommend your products to others.

Gerhard T.

Impressive support

Again I am incredibly impressed by GHL’s levels of support 🙂

Andy O.

Great support

I will make sure to mention your super good support to all my saltwater friends and on the forums I’m using every day.

Thanks a lot, now I know where to put my savings…..

Thomas J.

Just thankful!

Thanks so so so so so so much you are a champion Profilux is the best thing ever. Thanks again!

Tony I.

Your support is really great

I would like to thank you and GHL for the super-fast repair.
This once again confirms my trust in GHL as a good partner for my aquariums.

Frank T.

Happy with ProfiLux

First of all I’m very happy with the ProfiLux, it’s doing its job perfectly.

Steven D.

Excellent products and superb service!

It is very pleasant to deal with you. Excellent products, superb service, brilliant responds!

I see that have chosen correct goods at correct people.

Rival B.

Endless possibilities

The possibilities with the ProfiLux controller and all the available accessories are fantastic and the usability makes it’s really fun to come up with more and more great ideas what to automate in my tank next …

Werner P.

ProfiLux is doing great!

And tank is doing great!

Mike D.

 

*) as GHL has customers all over the world, some testimonials have been translated from other languages into English

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.

Perfect

Finding success in your hobby can be easy . With our products, you are able to:

  • Perfectly simulate the natural environment for your livestock.
  • Easily create and maintain a biological balance.
  • React immediately if something needs your attention.

Our free PC SoftwareGHL Control Center, as well as our Apps, Webserver and myGHL cloud service keep you informed at all times.

Versatile

Our GHL Aquarium Technology product line consists of:

  • ProfiLux® Aquarium Controller
  • Mitras® High-Power LED-Luminaires
  • GHL Doser 2
  • Ample accessories and modular equipment

Alone or together, our modular products are the perfect match for your hobby.

Safe

Once up and running, you will love the ease and safety you get from using our products. You are also well equipped for the future because:

  • New products are constantly being added.
  • Your GHL system grows as needed and is expandable with nearly no limit.
  • You can simultaneously control and monitor several systems all from one controller (Above: Long-term Benthology research installation, IFM Geomar, Kiel).
  • We work closely with research facilities all over the world to bring you the latest in scientific grade measurements and data.

Read more about interesting application examples here.

News. Stay up to date.

Mastering Alkalinity: Key to Thriving Corals and a Balanced Aquarium

Alkalinity: Essential for Coral Health and Aquarium Stability In aquarium keeping, water chemistry plays a vital role in the health and stability of your aquatic environment. One key component is alkalinity, or carbonate hardness (KH), which refers to the water’s buffering capacity—its ability to resist changes in pH. This stability is especially important in both…

The Science Behind Coral Fluorescence: Understanding the “Wide-Band-Blue”

Fluorescent Proteins and the Ideal Spectrum for Vibrant Coral Colors Have you ever wondered why corals glow with such vibrant, otherworldly colors under aquarium lights? The secret lies in coral fluorescence, a fascinating process that involves special proteins that absorb and re-emit light in stunning hues. Whether you’re a hobbyist, coral breeder, or professional, understanding…

The Benefits of Automatic Fish Feeders for Aquariums

Simplifying fish care while promoting a healthy aquarium environment Keeping an aquarium comes with the responsibility of maintaining a consistent feeding schedule, which can be difficult for busy aquarists or frequent travelers. Automatic fish feeders provide a convenient solution that ensures fish are fed regularly, promoting their health and stabilizing the aquarium environment. But what…

GHL @ Instagram

Feed mode at 🍽️

With our Profilux 4 & its countless possibilities, everyday situations become even easier 💪🏼
During feeding mode, all the pumps in the aquarium switch off to make it even easier for your fish to eat 😊

GHL Your source for first-class aquarium controllers, dosers, and LED lighting 🌊💡🪸

#reeftanksofinstagram #aquascape #reels
#reefaholiks #eatsleepreef #reefscape #marinefish
#reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals #reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #usa #starsandstripes
#4thjuly #reefjunkie #love #reefrevolution #ghlaquariumproducts
#ghl #coraladdict #flags
#independenceday

Feed mode at 🍽️

With our Profilux 4 & its countless possibilities, everyday situations become even easier 💪🏼
During feeding mode, all the pumps in the aquarium switch off to make it even easier for your fish to eat 😊

GHL Your source for first-class aquarium controllers, dosers, and LED lighting 🌊💡🪸

#reeftanksofinstagram #aquascape #reels
#reefaholiks #eatsleepreef #reefscape #marinefish
#reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals #reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #usa #starsandstripes
#4thjuly #reefjunkie #love #reefrevolution #ghlaquariumproducts
#ghl #coraladdict #flags
#independenceday
...

98 0 instagram icon
🇺🇸 Merry Christmas from GHL! 🎅🏻🤶🏻

Christmas is a time for gratitude, joy, and celebration – and we at GHL want to take this opportunity to thank you for your continued trust and loyalty. To share the festive spirit, we’re giving you the chance to enjoy an extra gift this Christmas with our Holiday Coupon 
Promotion!
🎄 Receive Up to $200 Extra – For Free! 🎄

When you purchase a coupon in the GHL USA Store, we’ll add a bonus coupon to your order at no extra cost.
Get Your Bonus:
-Buy a $1000.00 coupon and receive an additional $200.00 coupon for free
-Buy a $500.00 coupon and receive an additional $90.00 coupon for free
-Buy a $250.00 coupon and receive an additional $40.00 coupon for free
-Buy a $100.00 coupon and receive an additional $15.00 coupon for free

🎅 Act Fast – Offer Ends Jan. 02, 2025!
The promotion runs until Jan. 02, 2025, so don’t wait too long to take advantage of it. Please note that we will be closed for Christmas and New Year from Dec. 21, 2024, to Jan. 01, 2025. During this time, no coupons will be issued. Bonus coupons for purchases made during the closure will be processed starting Jan. 02, 2025.
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 💡🌊💻
#reeftanksofinstagram #aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish #allmymoneygoestocorals #reefbuilders #saltwateraquarium #reefaquarium #nanoreef #spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank

🇺🇸 Merry Christmas from GHL! 🎅🏻🤶🏻

Christmas is a time for gratitude, joy, and celebration – and we at GHL want to take this opportunity to thank you for your continued trust and loyalty. To share the festive spirit, we’re giving you the chance to enjoy an extra gift this Christmas with our Holiday Coupon
Promotion!
🎄 Receive Up to $200 Extra – For Free! 🎄

When you purchase a coupon in the GHL USA Store, we’ll add a bonus coupon to your order at no extra cost.
Get Your Bonus:
-Buy a $1000.00 coupon and receive an additional $200.00 coupon for free
-Buy a $500.00 coupon and receive an additional $90.00 coupon for free
-Buy a $250.00 coupon and receive an additional $40.00 coupon for free
-Buy a $100.00 coupon and receive an additional $15.00 coupon for free

🎅 Act Fast – Offer Ends Jan. 02, 2025!
The promotion runs until Jan. 02, 2025, so don’t wait too long to take advantage of it. Please note that we will be closed for Christmas and New Year from Dec. 21, 2024, to Jan. 01, 2025. During this time, no coupons will be issued. Bonus coupons for purchases made during the closure will be processed starting Jan. 02, 2025.
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 💡🌊💻
#reeftanksofinstagram #aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish #allmymoneygoestocorals #reefbuilders #saltwateraquarium #reefaquarium #nanoreef #spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank
...

12 0 instagram icon
🇩🇪🇪🇺 Merry Christmas from GHL! 🎅🏻🤶🏻

Christmas is a time for gratitude, joy, and celebration – and we at GHL want to take this opportunity to thank you for your continued trust and loyalty. To share the festive spirit, we’re giving you the chance to enjoy an extra gift this Christmas with our Holiday Coupon Promotion!
🎄 Receive Up to 200 € Extra – For Free! 🎄
When you purchase a coupon in the GHL Store, we’ll add a bonus coupon to your order at no extra cost.
Get Your Bonus:
 -Buy a 1000.00 € coupon and receive an additional 200.00 € coupon for free
 -Buy a 500.00 € coupon and receive an additional 90.00 € coupon for free
 -Buy a 250.00 € coupon and receive an additional 40.00 € coupon for free
 -Buy a 100.00 € coupon and receive an additional 15.00 € coupon for free

🎅 Act Fast – Offer Ends Jan. 02, 2025!
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 💡🌊💻
#reeftanksofinstagram #aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish #allmymoneygoestocorals #reefbuilders #saltwateraquarium #reefaquarium #nanoreef #spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank

🇩🇪🇪🇺 Merry Christmas from GHL! 🎅🏻🤶🏻

Christmas is a time for gratitude, joy, and celebration – and we at GHL want to take this opportunity to thank you for your continued trust and loyalty. To share the festive spirit, we’re giving you the chance to enjoy an extra gift this Christmas with our Holiday Coupon Promotion!
🎄 Receive Up to 200 € Extra – For Free! 🎄
When you purchase a coupon in the GHL Store, we’ll add a bonus coupon to your order at no extra cost.
Get Your Bonus:
-Buy a 1000.00 € coupon and receive an additional 200.00 € coupon for free
-Buy a 500.00 € coupon and receive an additional 90.00 € coupon for free
-Buy a 250.00 € coupon and receive an additional 40.00 € coupon for free
-Buy a 100.00 € coupon and receive an additional 15.00 € coupon for free

🎅 Act Fast – Offer Ends Jan. 02, 2025!
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 💡🌊💻
#reeftanksofinstagram #aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish #allmymoneygoestocorals #reefbuilders #saltwateraquarium #reefaquarium #nanoreef #spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank
...

19 0 instagram icon
A great tank 🔥

@viking_reefing uses our range of control & dosing products 💪🏼
-How do you like it? 

GHL Your source for first-class aquarium controllers, dosers, and LED lighting 🌊💡🪸

#reeftanksofinstagram #aquascape #reels
#reefaholiks #eatsleepreef #reefscape #marinefish
#reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals #reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #usa #starsandstripes
#4thjuly #reefjunkie #love #reefrevolution #ghlaquariumproducts
#ghl #coraladdict #flags
#independenceday

A great tank 🔥

@viking_reefing uses our range of control & dosing products 💪🏼
-How do you like it?

GHL Your source for first-class aquarium controllers, dosers, and LED lighting 🌊💡🪸

#reeftanksofinstagram #aquascape #reels
#reefaholiks #eatsleepreef #reefscape #marinefish
#reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals #reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #usa #starsandstripes
#4thjuly #reefjunkie #love #reefrevolution #ghlaquariumproducts
#ghl #coraladdict #flags
#independenceday
...

150 2 instagram icon
Healthy fish & corals thanks to perfect water values 🐠🪸
-No problem with our Profilux 4, the Doser & the KH-Director 💻

Credits: @angelica_reef 
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting
#reeftanksofinstagram
#aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals
#reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank

Healthy fish & corals thanks to perfect water values 🐠🪸
-No problem with our Profilux 4, the Doser & the KH-Director 💻

Credits: @angelica_reef
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting
#reeftanksofinstagram
#aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals
#reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank
...

97 2 instagram icon
Hardy shows off his wonderful reef 🙌🏻

-Perfectly staged with our Mitras LX7 7506 (Coral Pop) 
-Controlled & dosed by Profilux 4, KH Director, Maxi 2.2 & Doser 2.1
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 💡🌊💻

#reeftanksofinstagram
#aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals
#reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank

Hardy shows off his wonderful reef 🙌🏻

-Perfectly staged with our Mitras LX7 7506 (Coral Pop)
-Controlled & dosed by Profilux 4, KH Director, Maxi 2.2 & Doser 2.1
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 💡🌊💻

#reeftanksofinstagram
#aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals
#reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank
...

218 0 instagram icon
Want some freshwater vibes?

Our @aqua_do_douce shows us his wonderful 800 liter fresh water biotope 🔥❤️

Controlled by GHL Profilux 4 
Illuminated with 4x Mitras Lightbar 3
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting
#reeftanksofinstagram
#aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals
#reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank

Want some freshwater vibes?

Our @aqua_do_douce shows us his wonderful 800 liter fresh water biotope 🔥❤️

Controlled by GHL Profilux 4
Illuminated with 4x Mitras Lightbar 3
————————————————————————————-
GHL Your source for first-class aquarium controllers, dosers, and LED lighting
#reeftanksofinstagram
#aquascape #reels #reefaholiks #eatsleepreef
#reefscape #marinefish #reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals
#reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank #reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium #ghl #coraladdict #summertime #ilovemyreeftank
...

28 4 instagram icon
Our promoterian @takeabreakhaveakitcat_ shows us her beautiful tank! 😍

Conrolled by Profilux 4, 2.1 Slave Doser and KH director 
The perfect flow is provided by our Versia stream and flow pumps 🌊
_______________________________________________
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 🌊💡🪸

#reeftanksofinstagram #aquascape #reels
#reefaholiks #eatsleepreef #reefscape #marinefish
#reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals #reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank
#reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium
#ghl #coraladdict #summertime
#ilovemyreeftank

Our promoterian @takeabreakhaveakitcat_ shows us her beautiful tank! 😍

Conrolled by Profilux 4, 2.1 Slave Doser and KH director
The perfect flow is provided by our Versia stream and flow pumps 🌊
_______________________________________________
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 🌊💡🪸

#reeftanksofinstagram #aquascape #reels
#reefaholiks #eatsleepreef #reefscape #marinefish
#reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals #reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank
#reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium
#ghl #coraladdict #summertime
#ilovemyreeftank
...

267 3 instagram icon
@inland_reef shows us his beautiful tanks again 😍
Monitoring the water parameters is no problem with the GHL Profilux 4 💪🏼
_______________________________________________
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 🌊💡🪸

#reeftanksofinstagram #aquascape #reels
#reefaholiks #eatsleepreef #reefscape #marinefish
#reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals #reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank
#reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium
#ghl #coraladdict #summertime
#ilovemyreeftank

@inland_reef shows us his beautiful tanks again 😍
Monitoring the water parameters is no problem with the GHL Profilux 4 💪🏼
_______________________________________________
GHL Your source for first-class aquarium controllers, dosers, and LED lighting 🌊💡🪸

#reeftanksofinstagram #aquascape #reels
#reefaholiks #eatsleepreef #reefscape #marinefish
#reeftank #reef2reef #reeffish #fish
#allmymoneygoestocorals #reefbuilders
#saltwateraquarium #reefaquarium #nanoreef
#spscoral #instareef #coralreeftank #marinetank
#reefaddict #reefjunkie #reefkeeping #reefrevolution #ghlaquariumproducts #aquarium
#ghl #coraladdict #summertime
#ilovemyreeftank
...

81 1 instagram icon

Beautiful and perfect aquariums.  Bring the aquarium of your dreams to life.

Take a look at some of our customer’s aquariums run by GHL products.

Enjoy Your Passion

GHL Takes Care of the Rest.