We bring expertise to the market. We manufacture and use Geosil50 extensively in water distribution systems and water storage tanks. We can advise on any challenges and issues our clients may face with different water systems, and the application of Geosil50 to these. What is Geosil50? Geosil50 is a hydrogen peroxide biocide stabilised by ionic silver to amplify the oxidation process. Unlike chlorine-based biocides, the active ingredient breaks down into water and oxygen, leaving no harmful residue or odours. Used in the disinfection process, Geosil50 provides effective and efficient elimination of Legionella. How Geosil50 works Geosil50’s powerful oxidising agent reacts with organic matter to destroy and break apart cell walls. It contains ionic silver which maximises the effectiveness of the disinfection process by increasing the susceptibility of bacteria to the effects of the oxidising agent.