Determine the nitrite level for optimal plant growth or the source of algae in freshwater and marine water. Laboratory comparative system to compensate for the water's own colour: fill the test tubes with the water to be tested, add the reagents in one test tube, place the test tubes in the support block, and read the values on the colour chart. Usage: new freshwater tank: once a week. New marine tank: once a week. And in case of green algae problems. Included in the: 1 Nitrate Test for around 40 measurements, 2 reagents, 2 glass test tubes with screw caps, syringe, measuring spoon, comparator, and colour chart. Refill reagents available separately.
