General Hydroponics GH1516 Indicator Fertilizer, 8-Ounce, Purple ph-test-strips, natural

Amazon.com Price:  $14.89 (as of 06/18/2024 20:05 PST- Details)

Fill a test-tube halfway with nutrient
Add a few drops of pH Test Indicator
Observe the coloration of the liquid in the test vial. Use 3 drops per 5mL of solution

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General Hydroponics GH1516 Indicator Fertilizer, 8-Ounce, Purple ph-test-strips, natural

Amazon.com Price:  $14.89 (as of 06/18/2024 20:05 PST- Details)

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