Lost count at 200 drops for CH!!

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T

timmco

Well-known member
Apr 12, 2021
47
North Texas
Pool Size
27000
Surface
Plaster
Chlorine
Liquid Chlorine
I'm a new pool owner and just got my TF PRO w/smart stir test kit today and decided to test the water for the first time. I was testing CH and lost count at 200 drops!! So I tested again with the same result! and it still wasn't blue! I then tested my hose water to see if I could get a different result and it turned blue at 5 drops. I tired to be as accurate as possible and used the smart stir.
The water tested by a pool store last week and they said the CH was 512.
Is it possible that I did the test wrong? Did I get bad drops? Which test should I trust?
 
Last edited:
I assume you are using a TF100. Do you have a Smartstir?

In the directions I linked, follow the metals interference process. Do the sample dilution method if necessary.
 
Clear - that is a new one. How many drops of R0011L did you use?

What are your other chemistry parameters?
 
To reiterate, try the interference method. You add a few drops of 12 first (but still count them in your total).

I also find the light on the speed stir helpful for the CH test.
 
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Make a sample of 2 parts distilled water and 1 part pool water and then test the sample for calcium using the interference test.

Post the steps that you use including the calculations.
 
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