Care Bacter contains bacteria on a substrate of powdered Maerl gravel, which keep fresh or seawater aquaria clean. Mode of action: 1. Various green and filamentous algae will be greatly reduced, algae growth on aquarium panes will be retarded. The introduced bacteria are in competition with the algae mentioned. 2. Nitrate and phosphate compounds decrease. The bacteria take up nitrate and phosphate compounds as food and are digested by corals, respectively separated by a skimmer or filter at the end of their lives. 3. Corals and fish get more vital. The bacteria and the other contents supplement the defenses and reduce the risk of deseases esp. of Vibrio infections. 4. The aquarium appears much cleaner and organic detritus / duff is significantly reduced. The bacteria can use the detritus / duff as food. Non-pathogenic bacteria for humans and the environment. Doesn’t contain any toxic materials. No overdosing possible! The product is not suitable for human consumption! Avoid eye contact! Keep away from children!