The Wide Range pH test kit is used to measure genral pH in the range of 5.0 to 9.0. This kit is primarily used to find out the general pH in this range. Once you know the general pH of your water, you can utilize the High or Low Range kits to get a more accurate reading. This kits comes with enough reagent to do 160 tests.
Aquarium Pharmaceuticals makes this kit extremely accurate and simple to use.