Removal of discolouration and high molecular organic impurities: pellet-shaped activated carbon for the use in aquarium filters To use: put the carbon in universal filter bag, rinse repeatedly under warm water, reflush cold. Embed in the filter. Adjustment to pH 8: suited for the use in the pH range from 7.5 to 8.5, can be used immediately No release of bound substances, 100  free of phosphate, pH-neutral and conductance neutral, suitable for Malawi and Tanganyika aquariums