Dissolved oxygen in water is crucial to plant and animal aquatic life. In home aquariums, the levels can be crucial for the health of certain fish. Oxygen test kits are available that let people easily test oxygen levels in small and large bodies of water.
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Purchase an oxygen test kit appropriate for the type of water being tested. Aquarium test kits differ from test kits designed for larger bodies of water.
Obtain a water sample based on the instructions in the test kit. For aquariums, this is generally a few ml of water. For large water bodies, the depth of the water sample is sometimes critical due to different dissolved oxygen levels at different depths. For large water bodies, multiple samples in different areas are usually recommended.
Follow the instructions provided with the oxygen test kit. Depending on the type of kit, there will be chemicals or test strips added to the water. Some test kits recommend training before using to ensure proper results. Aquarium test kits are designed to be used by almost anyone.
Read the test results provided by the test to determine the water's oxygen level. Some tests provide a scale or chart to show the proper levels of oxygen.
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