Antifreeze; Activated carbons for filter material; Biologically active enzymes and microorganisms that are aimed at sanitising water environments and to treat the activation and optimisation of biological filter systems; Ceramic particles for use as a filtering media in filters; Deionised water; Distilled water; Liquid carbon dioxide; Salt for water softening; Salts for industrial purposes; Water-softening preparations; Chemical preparations for use in soil remediation, drinking water treatment, municipal and industrial wastewater treatment; Chemical preparations in the nature of ion-exchange resins; Chemical solutions in the nature of multimetal corrosion and scale inhibitor treatments for hydronic heating and cooling systems