Aquarium water testing is now regarded as an essential practice. "If you keep good water you will keep good fish". Aquarium Water testing can help reduce disease outbreaks and lead to improved health and vitality of your fish. Many elements in an aquarium can be tested for such as Ammonia, Nitritre, Nitrate, pH Carbonate Hardness, General Hardness, Oxygen, Carbon Dioxide, Iron, Copper, Magnesium, and Calcium. Many manufacturers produce reliable test kits.
If you regularly use an aquarium test kit on your fish tank you are ensuring your marine and tropical aquarium good hasstle free maintenence.
Water testing Kits come in a huge variety and and it is good practice to regularly test your aquarium water at least once a week