GH pH Test Indicator Solution - 8 oz
Need a refill for your General Hydroponics pH testing kit?
This bottle of pH Test Indicator Liquid is the same solution that General Hydroponics includes in their pH Test Kit and pH Control Kit.
Its simple to use and gives you fast results that are easy to read.
Use 3 drops of pH Test Indicator for every 5 milliliters of nutrient solution to determine the acidity or alkalinity level in your hydroponics reservoir.
Simply compare the resulting color of your test sample to the pH chart printed on the label of the pH Test Indicator Solution bottle.