A unique composition of specially selected probiotic bacterial strains, designed to accelerate the decomposition of organic matter. It breaks down substances toxic to fish and, by releasing macro and micronutrients, increases their availability. Pro Bio S is particularly recommended for large, demanding, and heavily stocked tanks. The bacteria in Pro Bio S initiate the process of reducing harmful nitrates and phosphates, which are then removed from the water by a protein skimmer. Pro Bio S creates a natural biological filter, preventing the development of pathogenic microflora. The use of probiotic bacteria significantly reduces the risk of disease in aquarium inhabitants and increases their resistance to stress. The bacteria are also an excellent source of bacterioplankton – the most important food for corals. A natural precipitate may form on the surface of the product. This has no effect on the quality or effectiveness of the product.