Doser 2.1 Slave Unit - 4 pumps - White

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Discontinued by Bulk Reef Supply
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Keep your water values permanently stable. 

Dose trace elements, fertilizers, balling salts, or water, precisely to the milliliter; with GHL metering pumps the automatic addition of fluids is a breeze. Programming is done by specifying the daily dose amount and the number of doses per day. Alternatively, you can also use timer functions if you wish to dose at specific times.



  • Milliliter precision and automated dispensing
  • Expandable to 16 pumps respectively metering channels
  • Stainless steel motor shafts (also suitable for the dosage of Iodine)
  • Chemical resistant tubing (Norprene®)
  • Manual operation of each individual pump is possible
  • Pumps can be retrofitted
  • Individual parts can be replaced (hose, pump head, motor)
  • Easily chose dosing times via software (GHL Control Center).
  • Individually: Up to 8 doses per day individually set
  • Each pump can be set separately
  • Level indicator
  • Alarm function


The high quality materials inside the doser ensure a long lifespan. If a pump needs to be replaced after many hours of operation, you can easily exchange it, thanks to the modular design.


The Right Model For Each Purpose.

The Doser Slave is available in versions with 2 to 4 pumps, pumps can be retrofitted at any time. Each pump can also be operated manually for easier replacement of liquids.

  • Doser without integrated controller (Slave Unit)
    • The device has an interface for connection to a ProfiLux Controller or to a Stand Alone Doser with integrated control electronics. If the Slave Doser is driven by a ProfiLux with level control, a pump can also be used for automatic level control or auto top-off.


All GHL Dosers are designed and made in Germany. From start to finish, we carry out the engineering-implementation and development of all our products. Tests for market maturity and production also take place in Germany. Our goal is to develop long-lasting and well thought-out products by considering even the smallest of details. We want to give you the most out of our equipment and help you get the most out of your hobby.


Dosing tubing not included -- we suggest using Drew's Pre-Cute Doser Tubing



  • Dimensions: 8.7" x 6" x 3" or 220 x 150 x 76 mm (without pumps)
  • 4 x 24V stepper motor pumps
  • Doses up to 8-45 ml / minute (precisely adjustable to 0.1 ml)
  • Up to 150 doses per day
More Information
UPC 4260350285151
Compatible with Controllers GHL
mL Per Minute 1mL to 50mL
Duty Rating Intermittent
Max Head Height Over 20 Feet
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