GHL Doser 3 Maxi – Powerful dosing for large volumes

The GHL Doser 3 Maxi is built for aquariums that need high precision and flow rates well beyond standard dosing pumps. With an adjustable delivery speed of up to 350 mL/min and silent 24 V stepper motors, it is the ideal choice for automatic water changes, top-off systems, and other applications that require reliable, large-volume dosing. Other notable features are continuous run capability and easy-to-maintain pumps.

Within this category you will find both available models:

• Doser 3 Maxi SA (Stand-Alone) – autonomous unit with sensor ports and network connectivity.

• Doser 3 Maxi EXT (Extension) – expansion unit for adding more dosing pumps to an existing system.

Both versions feature two stirrer outputs for mixing solutions before dosing. Designed and manufactured in Germany, the GHL Doser 3 Maxi combines robust build quality with professional-grade functionality.

Additionally available in this category:
GHL Doser 3 Maxi SA+EXT Set – money-saving bundle with one Stand-Alone and one Extension (4 pumps total). Ready to run as a standalone, high-flow 4-channel solution – ideal for newcomers and upgrades, expandable later.