Industrial Test Systems manufactures the most dependable water testing kits, strips, tablets, and reagents. Purchase an Industrial Test Systems test kit or set of strips to test for contaminants such as the following: Arsenic, Copper, Cyanide, Nitrates, Nitrites, Ammonia, Lead, Chromium Hexavalent, Radiation, Bacteria, Alkalinity, pH, Chlorine, TDS, and more! Checking contaminant levels in your pool, spa, and well water is important for determining if action is necessary. Industrial Test Systems kits and strips are patented, simple to use, are designed for specific contaminant readings, and ensure accurate readings with each use!