General Hydroponics pH solution tester 1oz
Hydroponic pH liquid tester. Covers a pH range of 4.0 to 8.5.
1. Fill test vial with a 3 ml of the hydroponic solution
2. Add 3-5 drops of pH test indicator to vial.
3. Tap the side of the test vial to mix contents.
4. Observe the color in the test vial and compare with the color card.
Makes testing easy and reliable.