amtra Proclean Food is a balanced composition of carbon, macroelements and B vitamins that serve as a nutritional basis for the bacteria that form the aquarium's bio-filter mass. In freshwater and saltwater aquariums, biologically available carbon is important to ensure adequate nutrient supply to the bacteria responsible for the degradation of nitrate (NO3) and phosphate (PO4). Thanks to amtra Proclean Food, both the optimal COD/BOD5 ratio and the redox potential of the aquarium water are favorably influenced.