
These 3in1 testing strips by Probazen are used to determine the pH level, free chlorine content, and total alkalinity of pool water. They are perfect for regular home use.
Dip the strip into the pool water and remove it immediately. Hold the strip horizontally for 10 seconds and then compare the pH, free chlorine concentration, and total alkalinity (in this order) with the color patterns printed on the packaging.
Seal securely after use. Store at room temperature.