Simple and safe control of water parameters in aquarium/pond. Determination of the optimal copper level for heavy metal control in freshwater and seawater. Laboratory comparison system to compensate for the water's own coloring: fill test tubes with water to be tested, add reagents to a test tube, place the test tubes in the test block, read off the values on the color chart. Use: for new water releases, fish/invertebrate mortality and dosing of copper-containing drugs. Included in delivery: 1 Copper (Cu) Quick Test, contents for approx. 50 measurements, 2 reagents, 2 glass test tubes with screw caps, syringe, comparator and colour chart. Reagent refills available separately.