Clarifies aquarium water, while removing gill irritants, active pharmaceutical ingredients, dyes, and other organic and inorganic pollutants. Optimizes the activity of bacteria in the substrate and in the filter system. Improves plant growth, reduces the presence of phosphates. For fresh and marine water. DOSES: 10ml/20lt. With regular use every two weeks pour 5ml/20lt. At the first use, double the dose. Shake before using.