Air conditioner for aquarium water for the prevention and elimination of protozoal infections and the destruction of worms in home aquariums. The FORMAMED conditioner is designed to create and maintain a safe, healthy environment in freshwater and saltwater aquariums. It is a combination of formalin, copper sulphate and nickel sulphate, which allows to effectively condition aquarium water, preventing the development of protozoa, worms and polyps. Key features: • Prevention and elimination of protozoal infections and the destruction of worms in home aquariums. • Toxic to invertebrates and aquatic plants. It is possible to condition water in aquariums without removing fish from them, with the exception of those that have open wounds. It should also be borne in mind that air conditioning has an adverse effect on aquarium invertebrates and some plants.