Dennerle Aqua Elixier renders critical substances in tap water harmless and adds active substances.Dennerle Aqua Elixier+ neutralises harmful chlorine instantly+ binds toxic heavy metals such as copper and lead+ protects the gills, mucous membranes and fins of fish using high-quality protective colloids+ for healthy, vibrant coloured fish+ with valuable leaf-extract from the moringa tree (Moringa oleifera), the Tree of LifeDosage of Dennerle Aqua Elixier:Add 2 ml for 10 litres of fresh water (tap water) during new setup of an aquarium or during water change. One srew cap corresponds to approx. 20 ml.