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pH Test Kit
pH Test Kit
pH Test Kit

pH Test Kit

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General Hydroponics pH Test Kits make pH testing easy. Simply 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. Many experienced growers prefer our pH Test Kit to expensive electronic meters because of its reliability and ease of use, which are important factors when the health of a valuable crop is at stake. Use 3 drops per 5ml of solution.

The pH Test Indicator uses a highly sensitive, concentrated liquid solution that instantly changes color based on the acidity or alkalinity of your water. It provides an immediate, visual readout of your nutrient solution's pH, helping you easily identify potential nutrient lockout before it affects your crop.

Fill a clean test vial halfway (approximately 5ml) with your fully mixed nutrient solution. Add 3 drops of the pH Test Indicator, gently shake the vial, and observe the coloration of the liquid. Match the resulting color against the standard General Hydroponics® pH color chart to determine your level.

Digital pH pens require constant calibration, expensive storage solutions, and batteries—and they can drift or fail without warning. The pH Test Indicator never requires calibration, never runs out of batteries, and never lies. It gives you an unshakeable, cost-effective benchmark to keep your valuable crop safe and thriving.

Product guide

How to use this product

Review usage guidance, compatibility notes, and grower tips for this product.

Usage Guide

pH Test Indicator — How to Use

  • Testing Routine: Test your reservoir regularly, especially after adding fresh water, nutrients, or top-offs.
  • Clean the Vial: Always rinse the test vial with fresh water before and after each test to avoid cross-contamination and false readings.
  • Read in Clear Light: For the most accurate color matching, hold the tested vial up against a white background under natural or clear, full-spectrum light.

Grower Benefits

pH Test Indicator — Key Benefits

  • Wide Testing Spectrum: Accurately measures a broad range from pH 4.0 all the way to 8.5.
  • The Industry Backup: The ultimate, low-cost safety net that every grower keeps on hand to double-check digital meters.
  • Super Concentrated: A small 1 oz bottle provides hundreds of tests, making it incredibly economical.

Safety First

pH Test Indicator — Resources & Safety

Store tightly sealed in a cool, dry place away from direct sunlight and extreme temperatures. Keep out of reach of children. Follow the product label and SDS for handling, PPE, storage, and disposal.

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