JBL Pond water test ProAquaTest NO2 Nitrit Refill

Nitrite is a toxic nitrogen compound that is produced when there is a disturbance in the bacterial balance or during a new tank setup. The test accurately shows the nitrite levels in the water. It's a laboratory comparison system to balance the natural colour of the water: fill the test tubes with the water to be tested, add the reagents to one tube, place the tubes in the support block, and read the values against the colour chart. Use: for a new freshwater tank: every day for 3 weeks. For a new saltwater tank: once a week. And in case of diseases or fish deaths. Included in the: 1 Nitrite Test for about 50 measurements, 2 reagents, 2 glass test tubes with screw caps, syringe, comparator, and colour chart. Refill reagents available separately.