The Eheim Automatic LiquiDoser provides the ideal solution for healthy, luxuriant growth of all aquarium plants. Aquarium plants take in the nutrients they require via their roots, but also directly from the water through their leaves. Thus, regular doses of fluid fertilizer should be added to the water for better results. The LiquiDoser with a LCD display has an electronic programming control for daily exact fertilizer doses (can be used with other additives) adjusted to the size of the aquarium. Just position it on the aquarium hood. The LiquiDoser doses 1 ml per rotation with up to 8 rotations per 24 hour period. A manual release of fertilizer is possible simply by pressing a button. A transparent reservoir allows for easy viewing of the fluid level. Two-stage battery warning with safety cut-out function & clock function is built in to this device. Includes Eheim Aqua Fluid 7 concentrate for one container filling. The regular carefully dosed supply of Aqua Fluid 7 concentrate covers all nutrient requirements - above all iron & other mineral substances - and compensates for any deficiencies.