The GHE ph Test Kit is a fast, reliable and accurate pH test without batteries. Available in two sizes 30ml & 60ml.
This liquid pH tester is perfect for easy testing and as a backup to your digital meter. Covering a wide range, from 4.0 to 8.5. The 30ml kit gives up to 500 tests & the 60ml gives up to 1000 tests.
How to use:
Fill the supplied test tube halfway with nutrient solution, add two drops of pH Test Indicator, shake and compare the resulting colour with the chart to read your pH level.