Alkalinity bleaching out during testing

ksornberger

Member
Jun 25, 2023
6
Bradenton, FL
Pool Size
9700
Surface
Plaster
Chlorine
Liquid Chlorine
In the last 6 weeks or so when I test my alkalinity, the water turns red and then bleaches out immediately. I have to add several more drops of R-009 until it stays red. I’m wondering why it happens and at what point to calculate the amount. As soon as the sample turns red or when it stays red?
 
You should continue to add R-009 until the color is red. After it turns red, continue to add drops until the color of the red does not change, then subtract the last drop from your drop count.
Wipe the R-009 tip with a wet paper towel before using it, this will remove any static that will make drops smaller.

 
You should continue to add R-009 until the color is red. After it turns red, continue to add drops until the color of the red does not change, then subtract the last drop from your drop count.
Wipe the R-009 tip with a wet paper towel before using it, this will remove any static that will make drops smaller.

Thanks for your help. I overlooked the extended test instructions when I first started doing my own tests. Very informative.
 

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