CC Testing with SpeedStir


Gold Supporter
Sep 10, 2021
Houston, TX
Pool Size
Liquid Chlorine
Once I have my chlorine test solution clear ( FC test ), I add the 5 drops of DPD reagent. (All while SpeedStir is active). The solution remains clear.

If I go do another test, say PH, and the chlorine tests stay still ( NO SpeedStir active). The solution turns a pale pink.

If I turn the SpeedStir back on the solution stays pink, and If I add a drop of FAS-DPD reagent the solution clears up.

Letting solution sit again, it will eventually turn a very pale pink again.

Is my CC a bit more than it seems when I see no color change after adding the initial drops, or is my testing method flawed in some way?

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