GH pH Test Indicator Solution for Hydroponics General Hydroponics’ pH Test Indicator Solution provides a quick, dependable way to check the pH of your nutrient solution—no electronics required. The vivid color change makes results easy to read at a glance, helping you keep your reservoir in the ideal range for faster growth and healthier roots. Trusted by growers for its reliability and low maintenance, this liquid test is perfect for hydroponic, soil, and soilless setups. The 8 oz bottle offers excellent value for routine testing across veg and flower cycles. How to Use the General Hydroponics pH Test Kit Fill the test vial halfway with your nutrient solution, add 3 drops per 5 mL, and compare the coloration to your chart to determine pH. Adjust with pH Up/Down as needed, then re-test to confirm. This simple routine helps prevent nutrient lockout and supports consistent uptake for stronger plants and better yields. Features: Fast, reliable color-change pH testing—no calibration or batteries Helps prevent nutrient lockout and supports optimal uptake 8 oz size is cost-effective for frequent reservoir checks Works across hydroponics, soil, and soilless media Simple “3 drops per 5 mL” method for consistent, repeatable results
