What happens when you take the industry-leading, reliable, and precise GHL Doser 2 and enhance it with planetary gears, advanced connectivity options, and the convenience of OTA-updates?
Exactly: You get the GHL Doser 3 – unmatched in accuracy, packed with features, and built for long-term reliability.
Experience unparalleled precision with GHL’s Doser 3, featuring PrecisionDrive technology – the ultimate in dosing accuracy, reliability, and long-term performance.
When it comes to precision dosing, nothing compares to our flagship: the GHL Doser. Trusted by hobbyists and research facilities worldwide since 1999.
Combined with ever-evolving features and cutting-edge technology, the GHL Doser family remains a must-have for any serious aquarium.
GHL Doser 3 Highlights
Ultra-Precise
The GHL Doser 3 incorporates PrecisionDrive technology – a combination of 24V stepper motors and planetary gears, ensuring ultra-precise dosing with minimal deviation. This cutting-edge drive system offers outstanding accuracy, quiet operation, and unmatched reliability for every dose.
Unlike typical off-the-shelf solutions, this peristaltic pump is a complete in-house development by GHL. Designed and manufactured in Germany, it reflects our commitment to quality, performance, and innovation.
Built on Experience. Driven by Innovation.
Since 1999, GHL has stood for high-quality aquarium technology made in Germany. All products are developed and manufactured in-house, built for maximum precision and reliability.
With the Doser 3, we’ve taken this trusted foundation further: planetary gears, LAN and Bluetooth connectivity, and over-the-air firmware updates bring added performance and convenience.
Ease of Use and Multiple Connectivity Options
Easy and convenient operation with GHL Connect (app, web interface and cloud service) or GHL Control Center PC software.
Connect via WiFi, LAN or USB.
More ways to connect – even easier to use
With the addition of a LAN port and Bluetooth, the GHL Doser 3 offers even more flexible connectivity options. Bluetooth makes setup via smartphone faster and more convenient than ever. Firmware updates can now be done directly over Wi-Fi or LAN – easier and more convenient than ever, no USB connection required.
Precision and Flexible Dosing Schedules
The PrecisionDrive technology allows you to perform up to 250 micro doses per day. Precisely adjustable with a resolution of 0.1mL!
When determining the dosing times, you can choose your doses to be distributed automatically throughout the day — or up to 24 doses per day, individually set.
Tracking with the GHL Logbook
Keep track of all your aquarium-related events, set reminders, record past and current water parameters, and more with the GHL Logbook.
The GHL Logbook is your digital notepad for recording aquarium-related events, setting reminders, recording past and current water test results, and so much more.
„Have accurately set the dispensing at 0.1 ml and I am always impressed again how well it works“
Customer Review GHL Support Forum
Scalable to a Complete Dosing System
Need to control multiple dosing pumps? The GHL Doser 3 is the ideal solution, offering seamless expandability into a full dosing system. When used with a ProfiLux controller, you can independently manage up to 32 pumps – or up to 16 pumps when using any Stand Alone (SA) Doser.
Flexible. Modular. Fully Compatible.
The GHL Doser 3 Stand Alone includes integrated control electronics, allowing you to manage additional dosing units directly – whether it’s GHL Doser 3, 2.x Extension, or Doser Maxi Extension.
Thanks to full cross-compatibility, you can freely combine all versions: GHL Doser 2.x, 3, and Maxi – as Stand Alone or Extension models. Extension Dosers can also be connected to a ProfiLux 4 Controller for centralized control.
All dosing pump settings are easily configured – locally or remotely – using the GHL Connect app, the myGHL cloud platform, the built-in web interface, or GHL Control Center on your PC.
Did you know that you can use the Stand Alone Doser also as an Extension Doser?
Simply activate the Extension Mode with a single click.
Stand Alone and Extension Doser Ports
GHL Doser 3 Stand Alone
Smart Add-Ons for Full Control
Expand your dosing system with up to two level sensors for monitoring water levels in your aquarium or sump, and a temperature sensor for continuous tracking of water temperature.
For even more precise dosing, the GHL Magnetic Stirrer ensures liquids are properly mixed before each dose is dispensed – ideal for sensitive or concentrated solutions.
GHL Doser 3 Extension (EXT)
Easily Expandable, Perfectly Connected
Need more dosing heads? Simply add Extension Dosers to your Stand Alone Doser 3 – or control them directly with a ProfiLux Controller.
The GHL PAB system ensures interference-free, highly reliable communication using shielded, high-quality connection cables – even in complex setups.
GHL Doser 3: Precision – Connectivity – Evolved
Features at a Glance
PrecisionDrive Technology
- Ultra-precise 24V stepper motors
- Planetary gears for increased precision and dosing stability
- Doses as little as 0.1 mL
- Adjustable dosing speed – up to ~80 mL/min
- Quiet operation and high long-term accuracy
Ports and Expandability
- 4x ports for GHL Magnetic Stirrers
SA-models only:
- Integrated control electronics for independent operation
- Sensor ports for level and temperature monitoring
- LAN, Wi-Fi, USB and Bluetooth connectivity
- OTA-firmware updates
Reliable Communication & Integration
- Connect EXT models to Doser 3 SA or ProfiLux 4
- Interference-free communication via GHL PAB system
- Seamless integration with other GHL devices
- Ready for external GHL Control Pad
User Interface & Setup
- Simple setup via step-by-step guide
- Configuration via GHL Connect app, myGHL cloud, web interface, or GHL Control Center
- Illuminated status logo for clear visual feedback
Smart Logbook & Maintenance Tools
- Log water test results automatically from supported GHL devices
- Manually enter test data or events
- Visualize trends with customizable charts
- Set maintenance reminders (e.g. calibration, filter changes)
- Document livestock additions or changes
Flexible Dosing Schedule
- Up to 250 doses per day per pump in auto mode
- 24 programmable dosing times per pump
- Each pump operates independently
- Custom categories for easy tracking
Stay connected – everywhere
- App GHL Connect
- Cloudservice myGHL
- Webinterface
- Desktop software
All free of charge!
Smart Water Management
- Use level sensors to automate refilling (Auto Top-Off)
- Perform controlled water changes using minimum/maximum levels
- Reliable protection against overfilling or dry run
Requires GHL Doser 3 Stand Alone and level sensors
W x D x H: 220 x 150 x 76 mm – 8.7 x 5.9 x 3.0″
(without pumps)
Precision Meets Quality – Down to the Smallest Detail.
Each pump can be operated manually using the push buttons on the front panel. This makes it easy to perform quick actions such as manual dosing or priming the tubing.
Incredible performance and precision in a compact design: This peristaltic pump, featuring planetary gear and stepper motor technology, was custom-developed by GHL and is available exclusively in the Doser 3.
Maintenance and Wear Parts
The pumps of the GHL Doser 3 are largely maintenance-free. To ensure optimal long-term performance, we recommend occasional lubrication of the planetary gears, rollers, and tubing.
⚠️ Important: Unlike the GHL Doser 2.2, the Doser 3 requires periodic lubrication.
In contrast, the pumps of the Doser 2.2 must never be lubricated under any circumstances.
Tubes, rollers, and motors are classified as wear parts. Their service life depends on dosing frequency, flow rate, and environmental conditions. If you notice reduced flow, loss of prime, leakage, abnormal noise, or visible mechanical wear, the affected components should be replaced.
Thanks to the maintenance-friendly design of the Doser 3, all wear parts can be easily accessed and replaced. Matching replacement parts are available as accessories.