H Hydrex™ Comprehensive range of water treatment chemicals to suit all water treatment needs. Sludge treatment I Ionsoft® High-quality industrial and commercial water softeners. Ion exchange and Deionisation O Opus™ The Opus™ technology is a proprietary Optimized Pretreatment and Unique Separation process for desalination of feed water with high concentrations of silica, organics, hardness, heavy metals, boron and particulates. Membrane Filtration - reverse osmosis