Lower Dissolved Oxygen content in aquarium or fish pond directly leads to death of your precious aquatic animals. Lifesonic Dissolved Oxygen kit lets you know the dissolved oxygen levels of your aquarium/pond water. Unlike many other oxygen test kit which take 30 minutes or more for results, Lifesonic Dissolved oxygen kit gives you results within 5 minutes. The Lifesonic Dissolved Oxygen kit can be used to do 100 tests in very low expense.