Washing soda is really a natural cleaning agent, as it can be found in many places in nature, for example in the ashes of plants, in salty soils and in the water of some lakes. During its production, no by-products harmful to the environment are produced, and after use it decomposes in the water, so only its aqueous solution and soaps formed with fats come into contact with aquatic organisms. On the other hand, due to their larger molecules, traditional store-bought detergents can enter living organisms unchanged. Another advantage of washing soda is that it does not contain phosphorus, so it does not cause blooms and eutrophication, which are particularly harmful to aquatic life.