There are many different chemicals and minerals that might be found in water that aquarium owners do not want their fish to be swimming in. That is why aquarium water test kits are very important. With a test kit the water can be tested so that the fish will be safe and healthy. Some of the things that a test kit will check for are ammonia, nitrite, hardness, nitrate and pH levels. A test kit will also check to see if the water is too hard or too soft.
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