To determine the current oxygen level, then indicate if measures need to be taken to increase the oxygen content. Quick test for aeration control: fill the test tube with the water to be tested, add the reagents, and read the sample value from the colour chart. Usage: for a new setup (once a week) and in case of signs of low oxygen. Clear shift from yellow to dark red. On the site JBL/Themes/Aquarium or Pond, you will find detailed information on water tests and troubleshooting. Included in the box: 1 Quick test, enough for about 40 tests, 3 reagents, syringe, glass test tube with screw cap, and colour chart. Reagent refills available separately.
