Dosatron Pro Range Nutrient InjectorOverview Superior engineering is what sets Dosatron apart from other fertilizer injectors on the market. These injectors are engineered to provide repeatable results with minimal maintenance, saving time and money. Adjusting the amount of fertilizer injected is easy using the ratio selector stems. Dosatron nutrient injectors accurately inject nutrients or acids (pH Down) while watering your plants. They work without electricity, using only the water