General Hydroponics®, pH Control Kit (includes pH up, pH down, and pH test indicators) American Vinegar Works Highly valued in herbal traditions

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General Hydroponics®, pH Control Kit (includes pH up, pH down, and pH test indicators) American Vinegar Works Highly valued in herbal traditionsGeneral Hydroponics, pH Control Kit (includes pH up, pH down, and pH test indicators) For A Balanced Nutrient Solution The General Hydroponics pH Test Indicator can help you maintain an ideal pH level (which is between 5. 5 and 6. 5). This can be achieved by monitoring your pH using the super concentrated drops found with the test indicator. Based on the test results, pH Up or pH down (available separately) can be added to adjust the pH as needed. The