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. Doesnt contain any toxic materials. No overdosing possible! The product is not suitable for human consumption! Avoid eye contact! Keep away from children! Application: For the initial application we recommend a so-called shock vaccination (scoop included in the scope of delivery), which will effectively and quickly lead to a desired positive outcome: For aquariums from 500 to 1,000 liters (132 to 264 USgal.): 10 ml (0.33 fl.oz) per week (equivalent to 4 measuring spoons) for a period of 2 weeks. For aquariums from 100 to 500 liters (26 to 132 USgal.): 5 ml (0.17 fl.oz) per week (equivalent to 2 measuring spoons) for a period of 2 weeks. For aquariums from 30 to 100 liters (8 to 26 USgal.): 2.5 ml (0.08 fl.oz) per week (equivalent to 1 measuring spoons) for a period of 2 weeks. During the dosing, we recommend temporarily stopping the existing mechanical filter system and sea water skimming for 10 minutes, and to inject the dose directly into the aquarium biotope. Normal dosage after the first vaccination: For aquariums from 500 to 1,000 liters (132 to 264 USgal.): 2,5 ml per week (equivalent to 1 measuring spoon). For aquariums from 30 to 500 liters (26 to 132 USgal.): 1.25 ml per week (equivalent to 1/2 measuring spoon). During the dosing, we recommend temporarily stopping the existing mechanical filter system and sea water skimming for 10 minutes, and to inject the dose directly into the aquarium biotope. Concentration: 10^9 CFU/g Contents: 40 ml (1.33 oz.)