Tetra test pH is a measure of how acidic aquarium water is.
Fish do not like fluctuating pH levels, and some need to be kept at specific pH levels.
How it Works
The TetraTest pH kit is a liquid kit, which works by changing the colour of a water sample in relation to the pH level.
You simply need to compare the colour of the sample to the enclosed colour chart, to determine the pH.
You will get roughly 25 tests from each kit