Bromothymol Blue pH Tester

This is a narrow range pH test indicator solution suitable for hydroponic plant cultivation. It contains 0.1% pH indicator dye dissolved in 20% ethanol. The kit consists of a 1 fl. oz. dye bottle, a sample vial and the Color Chart. Below is the actual photo of the test vials filled with 1.5 ml of the test buffers with specified pH and the dye.

INSTRUCTIONS
1. Fill the vial with a tested medium to a level indicated on the Chart.
2. Add only one drop of the pH Tester solution. Note: adding more would give more saturated colors but they are hard to distinguish in a low pH range.
3. Compare color with the chart. Although it is not required, the best color difference you would see with a daylight fluorescent bulb (6500°K)

 ORDERING

Click on the "Add to Cart" button to buy it for $5.90 (S&H for orders up to $99.99 is $5.15 and free for orders $100 or more). Shipping to US locations is by USPS Priority Mail.