The General Hydroponics GH1515 pH Test Kit makes pH testing quick and easy. Simply fill the test tube halfway with nutrient, add 3 drops of pH test indicator per 5 mL of solution, and wait as the liquid changes color. Compare the color to the guide located on the bottle to figure out your pH level.

Features:

• Reliable way to determine pH
• Add 3 drops of pH indicator per 5 mL of solution
• Color guide on indicator bottle
• Size: 1 oz

Note: Due to HazMat restrictions this item is not available for shipment to Alaska, Hawaii, or anywhere outside the Continental United States.