General Hydroponics pH 4.01 Calibration Solution
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

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 2 inch
Height : 1.9 inch
Length : 5.8 inch

Item Weight: 2.1 pounds (View shipping rates and policies)
Shipping Weight: 2.3 pounds (View shipping rates and policies)

ASIN : B003Y3F34I