With the aid of osmosis water you can set the water values to match those to which the tropical fish and plants are accustomed in their natural habitat. Osmosis water enables even the most demanding creatures to be kept in an aquarium such as Discus or salt water fish. The systems work according to the principle of reverse osmosis: tap water is forced through a special membrane with ultra-fine pores by the pressure of the water mains supply. Only the small water molecules pass through this membrane. The larger molecules of harmful substances, hardness elements and salts are filtered out. Even bacteria and viruses are removed.The Dennerle Osmose Professional 190 osmosis systems remove not only hardness elements, but all substances which can harm aquaria or promote algae growth, for example: Nitrates, phosphates, chorine, heavy metals, pesticides, herbicides, etc. The end product is a very soft quality of water with a high level of purity - the ideal basis for all fresh water and sea wat