Testing of water in a fresh water aquarium involves two steps, the first is when you first start an aquarium and the second stage is when the tank has already been established and you have fish in them.

Fish thrive or die, depending on the water quality, so it is imperative for their health that you understand the sort of conditions and the quality of water that your fish need to live healthily. This is not uniform for all fishes, so a bit of study is necessary.

Procedure for a new fish tank:

You first need to establish that the nitrogen cycle has taken place. This is important because after this cycle has occurred it is safe to add fish. Fish waste and undigested food lead to an ammonia spike. This is the first stage of the nitrogen cycle and you can detect this by an Ammonia test. After this friendly bacteria called Nirosomonas start to breed, causing a nitrate spike. This is the second stage of the nitrogen cycle.

The third stage occurs when nitrospira bacteria breed converting the dangerous nitrite into less harmful nitrates. Once this occurs it is safe to add fish. Add the fish gradually, testing the water every couple of days, partially changing the water if there is too much ammonia or nitrite in it. This cycle takes place over a few weeks so it is important to keep testing the water so that you know which stage of the cycle you are on.

There are three test kits that are a must for any fish tank owner, to monitor the nitrogen cycle, Ammonia, Nitrite and Nitrate testing kits. You also need a pH testing kit to check the water for acidity. This is important because if there is too much of a difference in the acidity level of the tank they lived in before you bought them, they may die of stress or shock.

Once your tank is established you do not need to keep on testing all the time. However, you still need to check the water for nitrates. Even though nitrates are not as harmful as the nitrites and ammonia, too much nitrate can also be detrimental to the health of your fish. To avoid any kind of problems, make it your habit to check the water quality and carry out regular water changes so that your fish are healthy and active. You can control the nitrate build up by adding plants and nitrate eating fish to your tank and monitoring the quality of water.

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