hw hydrokoll is a unique solution of organic colloids for the biological conditioning and stabilisation of fresh, synthetic seawater of all manufacturers. It also serves for optimal protection and as a stress reducer when moving or transporting all forms of marine life. hw hydrokoll gives the sensitive mucous membranes added protection and helps reduce the risk of injury and infections to a minimum. hw hydrokoll replaces the natural protective colloids present in natural seawater and counteracts irritation and toxication caused by the heavy metals, phenols and bacterial toxins often contained in tap water.