General Hydroponics® pH Test Indicator, 8 oz

General Hydroponics® pH Test Kit

This concentrated General Hydroponics pH Test Indicator is simple to use and offers dependable results that are easy to read. Three drops of pH Test Indicator for every 5 milliliters of solution will determine the acidity or alkalinity of a plain water sample or nutrient solution; the resulting color of the sample corresponds to the pH chart included on the bottle.