Salifert Profi test Oxygen
Corals and marine fish require very high levels of oxygen. Because oxygen has a low solubility in salt water, it is very important to regularly test the level of oxygen present. The Oxygen Salifert Profi-Test is extremely fast; measuring the oxygen content is done in just a few minutes and is measured from 2 to 14 mg / L.
Sufficient for 40 tests. Can be used for sea water, fresh water and garden pond water.