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 st...