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Carbon Dioxide (CO2) is present in water as a dissolved gas, like oxygen. High CO2 can stress and even kill fish. It also forms carbonic acid, which lowers the pH. For freshwater and marine this kit will alert you of any carbon dioxide, so as you can take further steps to eliminate the problem.
Also good for the keen plant grower using Co2 with his planted tank.
Also good for the keen plant grower using Co2 with his planted tank.
