pH measuring kit that has a small sample tube, a reagent liquid with which to treat the water sample and a table with colored pH ranges to compare with the sample.

The resolution is 0.5 points and with this kit you can measure from pH 4.0 to pH 8.5.

How to use

1. Fill half a test tube with the nutrient solution
2. Add two drops of the pH Test
3. Stir the mixture and compare the resulting color with the colors on the table