Chlorine drop test.

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J

jdog1

Member
Jul 27, 2024
9
Wichita kansas
Pool Size
3975
Surface
Vinyl
Chlorine
Liquid Chlorine
I know the instructions say that I need to do one drop at a time swirling after each drop but if I know that my drops should be let's say around 25 can I just go ahead and put 15 drops in and then start swirling after each drop after that?
 
It’s better to work in smaller batches of drops like 2 - 5. But, you wont always know your drops are “supposed” to be an actual number, hence the reason for the test.

If you drop in 15 right away and the sample turns clear after swirling, you wont know on which drop it turned clear and will have to retest anyway, wasting reagent.

Accuracy is the most important thing and the difference between 2 at a time versus 15 at a time may be 3 seconds? You’re not really saving anything, and your sacrificing accuracy and material.
 
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casiokid said:
It’s better to work in smaller batches of drops like 2 - 5. But, you wont always know your drops are “supposed” to be an actual number, hence the reason for the test.

If you drop in 15 right away and the sample turns clear after swirling, you wont know on which drop it turned clear and will have to retest anyway, wasting reagent.

Accuracy is the most important thing and the difference between 2 at a time versus 15 at a time may be 3 seconds? You’re not really saving anything, and your sacrificing accuracy and material.
Click to expand...
I understand what your saying but if I know I added enough chlorine it's not going to start changing for example until well into the 20 to 30 drop range. Is it ok to go ahead and drop 15 then slow down. Actually in my case 50 drops. So I could add 20 to 30 then slowly add more.
 
50 drops??? If using the 25ml sample of water, that puts you at 10ppm FC. Use 10ml of water instead, and figure each drop is .5 ppm (so you'd need only 20 drops). That level of accuracy is more than enough. It will save you a lot of reagents. And imagine the amount of time you will gain not having to count to 50! Or, if you are already using 10ml, that puts you at a FC of 25 (!) - you must be doing a SLAM!

Here are the full instructions for using the 10ml sample size:
  1. Rinse the sample tube with pool water.
  2. Fill the sample tube with pool water to the 10 ml mark. The top of the sample will be curved. This curve is called a meniscus. The bottom of the meniscus should be level with the 10 ml mark.
  3. Using the small spoon shaped end of the dipper, add one heaping dipper of R-0870 and swirl to mix.
  4. Swirling constantly and counting the number of drops as you go, add R-0871 one drop at a time. Continue adding drops until the color changes to clear. The pink color may become extremely faint before it goes away. Make sure that the sample goes completely clear.
  5. Multiply the number of drops by 0.5 to get your FC level.
  6. Add 5 drops of R-0003 and swirl to mix. If the sample remains clear, your CC level is zero.
  7. If the sample turns pink again, add R-0871 one drop at a time, swirling constantly and counting the number of drops as you go. Continue adding drops until the color changes to clear. The pink color may become extremely faint before it goes away. Make sure that the sample goes completely clear.
  8. Multiply the number of drops by 0.5 to get your CC level.
  9. Dispose of the sample safely. It is best to pour it down the drain with the water running. Do not add it back to the pool.
  10. Rinse the sample tube with tap water and store for next time.
 
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jdog1 said:
I understand what your saying but if I know I added enough chlorine it's not going to start changing for example until well into the 20 to 30 drop range. Is it ok to go ahead and drop 15 then slow down. Actually in my case 50 drops. So I could add 20 to 30 then slowly add more.
Click to expand...
The answer to your question is “yes” it’s fine to do that.

But yes like above, switch to the 10ml sample so you don’t have so many drops (and math) to do.
 
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sande005 said:
50 drops??? If using the 25ml sample of water, that puts you at 10ppm FC. Use 10ml of water instead, and figure each drop is .5 ppm (so you'd need only 20 drops). That level of accuracy is more than enough. It will save you a lot of reagents. And imagine the amount of time you will gain not having to count to 50! Or, if you are already using 10ml, that puts you at a FC of 25 (!) - you must be doing a SLAM!

Here are the full instructions for using the 10ml sample size:
  1. Rinse the sample tube with pool water.
  2. Fill the sample tube with pool water to the 10 ml mark. The top of the sample will be curved. This curve is called a meniscus. The bottom of the meniscus should be level with the 10 ml mark.
  3. Using the small spoon shaped end of the dipper, add one heaping dipper of R-0870 and swirl to mix.
  4. Swirling constantly and counting the number of drops as you go, add R-0871 one drop at a time. Continue adding drops until the color changes to clear. The pink color may become extremely faint before it goes away. Make sure that the sample goes completely clear.
  5. Multiply the number of drops by 0.5 to get your FC level.
  6. Add 5 drops of R-0003 and swirl to mix. If the sample remains clear, your CC level is zero.
  7. If the sample turns pink again, add R-0871 one drop at a time, swirling constantly and counting the number of drops as you go. Continue adding drops until the color changes to clear. The pink color may become extremely faint before it goes away. Make sure that the sample goes completely clear.
  8. Multiply the number of drops by 0.5 to get your CC level.
  9. Dispose of the sample safely. It is best to pour it down the drain with the water running. Do not add it back to the pool.
  10. Rinse the sample tube with tap water and store for next time.
Click to expand...
Yes I'm in the middle of SLAM with mustard algae which for my cya shows 24.8 ppl so 50 drops would be what I need to stay at that level. Correct?
 
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jdog1 said:
Could I switch to 5ml and cut it in half that way?
Click to expand...

You can but you sacrifice accuracy.

What you measure as 25ppm may be 22ppm or 28ppm. It makes it harder ensuring you have at least SLAM level FC.
 
jdog1 said:
Yes I'm purchasing one but am going to wait until next season. This one's almost over.
Click to expand...
Understood, but I would highly recommend getting one now, especially if you're in a SLAM. It's worth every penny. You'll thank me later. Your testing will instantly become faster, better, and more enjoyable.
 
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