The GHL Doser 2.2 Standalone is a versatile and precise dosing system designed for saltwater reef aquariums. It can deliver up to 45 ml per minute, making it suitable for standard dosing quantities as well as small volume automatic top-off or water changes of less than 1.5 gallons daily recommended. The inclusion of highly efficient stepper motors ensures micro-dosing capabilities down to 0.1 mL increments, providing the utmost control and precision in maintaining a stable aquatic environment. Additionally, its robust mechanics allow for continuous operation at constant speeds, ideal for running reactors or other dosing applications.