A unique composition of specially selected probiotic bacterial strains, designed to accelerate the decomposition of organic matter. Decomposes toxic substances for fish and by releasing macro and micronutrients increases their availability. Pro Bio S is particularly recommended for large demanding and highly supplied reservoirs. The bacteria present in Pro BIO initiate the process of reducing harmful nitrates and phosphates, which are then removed from the water by a skimmer of protein. Pro Bio S creates a natural biological filter, preventing the development of pathogenic microflora. The use of probiotic bacteria considerably reduces the risk of diseases of the inhabitants of aquariums and increases their resistance to stress. Bacteria is also an excellent source of bacterioplankton - the most important coral food. -Np pro as a nutritious solution. A natural precipitate can form on the surface of the product. This has no effect on the quality and effect of the product.