Fill a test-tube halfway with nutrient, add a few drops of pH Test Indicator, and observe the coloration of the liquid in the test vial. Use 3 drops per 5mL of solution.
- Tech Specs
Brand General Hydroponics SKU HGC722140-PCK Weight (lb.) 0 Prop 65 No Lead Time Due to social distancing requirements, this item ships in 2 weeks UL Listed No