Assure Controls uses a patented technology for rapid and affordable use of biosensor detection for contaminants at toxic levels in water and soil samples. Designed for use in discharge treatment assessment, water treatment plants, fisheries and aquaculture, concentrated animal husbandry, and closed re-circulating ssytems. The QwikLite Testing System uses sensitive bioluminescent plankton to rapidly determine toxicity of potential contaminants in both inorganic and organic samples Products | Assure Conrols 2011-11-22