Clear Water Elixier is a liquid filter medium for a quick, long-lasting improvement of the aquarium water quality. Clear Water Elixier affects the aquarium like a cleansing summer rain shower affects the natural world. The mineral particles remove the finest impurities, colours, unpleasant smells, ammonium, heavy metals, medication residues and other harmful substances from the water like little magnets. The “cleaning cloud” vanishes after 12 to 24 hours (maximum 48 hours) – and the whole aquarium visibly comes to life.