Quote Originally Posted by moreyes View Post
Hey thanks for the help. So do they actually sell a test kit for CC I see them for FC?

Pardon my pool water ignorance
To help you understand how it's done, here are the printed instructions that come with the FAS-DPDtest for testing FC and CC:


DROP TEST In8tr.15217
FAS-DPD CHLORINE (1 drop = 0.2 or 0.5 ppm) COMPONENTS:

1 x 9198 Sample Tube, Graduated, 25 mL, plastic w/cap
1 x R-OOO3 DPD Reagent #3, DB
1 x R-O870 DPD Powder
1 x R-o871 FAS-DPD Titrating Reagent (chlorine), DB

Chlorine Tests (Free & Combined) ..,/
1. Rinse and fill sample tube to desired mark with water to be tested.
NOTE: For 1 drop = 0.2 ppm, use 25 mL sample.
For 1 drop = 0.5 ppm, use 10 mL sample.

2. Add 2 dippers R-0870 DPD Powder. Swirl until dissolved. Sample will turn pink if free chlorine is present.
NOTE: If pink color disappears, add R-0870 DPD Powder until color turns pink.

3. Add R.0871 FAS-DPD Titrating Reagent (chlorine) dropwise, swirling and counting after each drop, until color changes from pink to colorless. Always hold bottle in vertical position.

4. Multiply drops in Step 3 by drop equivalence (Step 1). Record as parts per million (ppm) free chlorine (FC).

5. Add 5 drops R-OOO3 DPD Reagent #3. Swirl to mix. Sample will turn pink if combined chlorine is present.

6. Add R-O871 FAS-DPD Titrating Reagent (chlorine) dropwise, swirling and counting after each drop, until color changes from pink to colorless. Always hold bottle in vertical position.

7. Multiply drops in Step 6 by drop equivalence (Step 1). Record as ppm combined chlorine (CC).