
Conducting a DPD #1 Free Chlorine test with your Rainbow Pentair Pro 11 test kit is straightforward. Here's a step-by-step guide: First, fill the CL test cell to the designated line with your pool or spa water. Next, carefully add a single #1 DPD tablet to the test cell. Securely place the cap on the cell and gently invert the vial several times, allowing the tablet to fully dissolve. This usually takes between 15 and 35 seconds. Finally, compare the resulting color of the water in the test cell to the Free Chlorine (CL) color standards provided with your Rainbow Pentair Pro 11 test kit. Note the reading for future reference, as this sample can be saved for total and combined chlorine tests. For best results, always refer to your kit's instruction manual for detailed information and troubleshooting tips.


