Dennerle Clear Water Elixier is a liquid filter medium for a quick, long-lasting improvement of the aquarium water quality. Dennerle 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.Dennerle Clear Water Elixier+ removes the finest impurities, colours, unpleasant smells, ammonium, heavy metals, medication residues and other harmful substances+ the water acquires a striking clarity and brilliance+ for lively, healthy fish+ the optimised water quality makes the fish feel better, become more active and eat better+ healthy fish have intensively radiant colours+ the risk of skin diseases is reduced, existing mucous membrane damage heals mo