The Growth Technology pH Liquid Test Kit comes with a test vial, test liquid and colour chart so growers can easily check, and adjust the pH levels of their nutrient solution.
 
Just add some drops of test liquid to a sample of the nutrient solution, shake and compare the colour to the chart.
 
Supplied in 20ml bottles that will last for up to 400 test, giving growers peace of mind that the pH level of their nutrient solution is at its optimum for strong vegetative growth and bloom