GHL Doser Maxi


Dose large amounts with pinpoint precision.

The GHL Doser Maxi is the perfect dosing device for automatic water changes, as larger quantities of liquid up to 320 ml / minute can be pumped . Due to the used 24 V stepper motors, microdoses of 0.1 ml are also possible.

With the free GHL Connect App or the or the cloud service myGHL, you can always control anything from anywhere, start dosing programs or monitor the fill levels of your metering liquids. Thanks to the high quality technology inside the modern GHL Doser Maxi, it not only provides precise and simple dosing, but it also includes many more features. 

The GHL Doser Maxi can be run as a single unit or in combination with other GHL devices. Operate the device comfortably with your smartphone, tablet or PC. The connection is possible via WLAN, LAN and USB.

The LED illuminated GHL Logo in the housing serves as a status indicator. It displays the condition of your aquarium by displaying various colors and tells you when something requires your attention.

The GHL Doser Maxi is available as a Stand Alone Unit (SA), as well as a Slave Unit.

Features and Benefits Include:

Connect to an external magnetic stirring unit, the GHL Control Pad * or Temperature and Level Sensors.

* Not yet available

Refilling and changing water.

The pumps are suited for permanent operation, please see also Maintenance & wear parts below.

The 24V stepper motors allow precise dosing even at the smallest flow rates (0.1 ml).

  • Up to 150 doses per day
  • Easily chose dosing times via software (GHL Control Center).
    Automatically: Up to 150 individual doses per day automatically distributed
    Individually: Up to 8 doses per day individually set
  • Each pump can be set separately
  • Conveying capacity and dosing:
    up to 320 ml / minute (precisely adjustable to 0.1 ml)

The LEDbacklit GHL Logo in the housing cover serves as a status indicator. Various colors show you at a glance, the condition of your system.

  • White = Configuration mode
  • Blue = Normal
  • Green = Amount of liquid in the container is OK
  • Yellow = Warning threshold amount of liquid undershot
  • Red = Alarm threshold amount of liquid undershot

Learn more

Keep track and control of the liquid levels in your containers. An alarm signals that the minimum quantity has been reached.

  • Magnetic Stirrers
  • External GHL Control Pad (4,3” Touch screen)
  • Temperature sensors and Level sensors

Programming and operating the GHL Doser Maxi Stand Alone is easily accessible via the free PC software GCC, app and cloud service myGHL.

The connection can be made via WiFi, LAN, or USB.

  • We only use durable and quality materials.
  • The pumps on our Dosers all have chemical-resistant tubing and long lasting motors.
  • The housing is robust and made of hard-waring aluminum and durable plastic.

GHL Doser Maxi is available in two different models:

  • Stand Alone (SA): With integrated control
  • Slave: Without control, control via GHL Doser 2 Maxi SA, GHL Doser 2/2.1 SA, ProfiLux Aquarium Controller

In addition, select between white and black (cover).

You need more pumps? No problem: The system is expandable to a total of 16 pumps.

  • Stand Alone + one or more Slave Doser (GHL Doser 2/2.1 Slave or GHL Doser Maxi Slave)
  • ProfiLux Controller + one or more Slave Doser (GHL Doser 2/2.1 Slave or GHL Doser Maxi Slave)

The ProfiLux Aquatic Bus provides reliable and interference-free data transfer, even over long distances up to 100 m (300 ft.).

Color: Black or white

Dimensions: 220 x 150 x 103 mm (without pumps)

2 pumps with stepper motors, up to 320 ml / minute

Models: Stand Alone, Slave

GHL Doser Maxi, white 1

Also available with black cover.

GHL Doser Maxi, black

Did you know that you can use the Stand Alone Doser also as a Slave Doser?

So if you like to add a ProfiLux Controller to your system in the future
you can let the ProfiLux control your Stand Alone.

Simply activate the Slave Mode with a single click in the GCC.

Stand Alone and Slave Doser. An Efficient Team.

Do you need more than one device? If so, the GHL Doser Maxi is perfect for you because the Doser can be expanded into an efficient dosing system.

The autarchic Stand Alone unit has integrated control electronics. With it, you can additionally control other Slave Doser (GHL Doser 2/2.1 Slave or GHL Doser Maxi Slave) units.

The Slave Doser has an interface for control via the Stand Alone Doser (GHL Doser 2/2.1 SA or GHL Doser Maxi SA) or the ProfiLux Controller.

You can control a total of 16 pumps independently.

The settings for all the pumps can be adjusted easily and clearly with our software. Even when you are not at home, you can still have access.

The highly accurate 24 V stepper motors allow you to perform up to 150 doses per day. The dose is precisely adjustable to 0.1 ml!

When determining the dosing times you can either chose your doses beeing distributed automatically throughout the day. Or beeing distributed up to 8 doses per day, individually set.

Stand Alone and Slave Doser. Ports.

GHL Doser Maxi Stand Alone

Realize the full potential of GHL Doser Maxi Stand Alone:

You can also connect up to 2 Level sensors to monitor the water level in your basin and a temperature sensor for checking the water temperature. You can even use our Magnetic Stirrer to ensure that fluids are always mixed prior to dosing.

GHL Doser Maxi Slave

Expand your Stand Alone Doser or operate the Slave Doser with a ProfiLux Controller.

The connection is made without interference via the PAB Aquatic bus PAB cables.

Quality and Functionality. Down to the Smallest Detail.

GHL Doser Max,i manual dosing

Each pump can be operated manually via the push buttons on the front panel. This allows you to quickly post-dosing, deflating the tube vent or suctioning liquids.


Maintenance & wear parts

The pumps are largely maintenance-free. For optimal performance, we recommend occasionally cleaning and removing dust and other impurities from the inside of the pumps. In order to reduce noise during operation it is allowed to lubricate the pump with vaseline.

Tubes, pumps and motors are wear parts, the life time depends on the use frequency, flow quantity and environmental conditions.

Average lifetime: 5000 hours for the motor, 800 hours for the pump head.
When malfunctions (e.g. insufficient flow, losing prime, leakage, increased operation noise) or mechanical damages occur the pump head or motor must be replaced. Due to the maintenance-friendly design wear parts can be replaced easily, wear parts are available as accessories.


Are you in need of technical support or would like to have a buying guide?

If so:

Then join the growing GHL community by navigating to our dedicated support forum! Our GHL Support Forum offers you direct contact with the GHLTeam and our wide customer base and can provide you with a wealth of tips and guidance. Just make sure you stop by!