Steps - Switching from Baquacil to Chlorine

[GeneNTN]

Madwil,
Thank you for your comments - they are always helpful!
When you say, “remove FC first” I assume you mean by adding the R0781 drops until the water sample is colorless, which is what I have been doing. However, if there is a short time delay (making notes, etc.) until the 5 drops of R-0003 are added – the water sample will usually take-on a pinkish color? So…would you just add the R-0003 or go back and add some additional drops of R-0781? Would you happen to know of a better method of testing the CC at the lower end?
Gene

[madwil]

if the color comes back after the delay, I think that's the reagent beginning to react with CC- the reason why OTO only gives TC...
You do not have to go back and add addtional 0781- just continue the test as you have been doing. I do not know of any better way- Chemgeek or Waste may...

[CarlD]

That IS confusing. What you do is test the water sample for FC using 0870 powder and 0871 drops. Then TO THAT SAME SAMPLE add the R-0003, 5 drops. The water should turn clear if there's no CC, pink or red if there's some CC. Now use the 0871 drops AGAIN until the water goes clear to measure CC.

That's it!

Carl

[GeneNTN]

Madwil & Carl,
I follow the Taylor instructions per the letter – and do not repeat any of the previous steps. I guess an answer would be to use a 25ml water sample to begin with, which in turn would provide a 0.2ppm / drop of R0871 when testing for ‘lower levels’ (<= 0.5ppm) of CC. However, I will have to wait on my order of reagents (R0871 in particular) to try this method. I’m sorry if my previous posting was not real clear? Thank you and have a great day!
Gene

[madwil]

sorry if I was confusing- yes, you have to use the 25ml sample for the FC test, to get .2ppm results on CC (after completing the FC test)
I think that for most people, getting .2ppm results is probably not necessary- curiosity maybe, or chemgeek when experimenting for science...
But for me, <.5 is good enough on the CC, and my FC stays above 5 normally so not going to use that many drops to get it to .2 accuracy!

[GeneNTN]

Madwil,
I agree, and for a newbie like myself – not seeing any additional decrease in the CC reading, and not real sure just how low it should eventually read, I was simply looking for a better way to test the CC. In my opinion, the 10 hr / overnight numbers are the most telling for both the FC (loosing <= 1ppm) and the CC at <= 0.5.

Gene
PS – I put the Polaris into the pool to help the skimmer sock clean-up a lot of the very fine debris – and together they are doing a great job! The pool water continues to clear very nicely (look wise). Many “thanks” for all your help!

[GeneNTN]

Thursday, June 2nd 6:45 a.m. (Day 8)
Throughout the day on Wednesday the FC level was keep elevated by adding multiple dosages of chlorine (bleach 6%) based on the records from the prior 2 days – with only 1 water test was completed (8:30 p.m.).

The pool looks crystal clear Thursday a.m., with only a slight amount of noticeable debris on the bottom – mostly in the shallow end? The Polaris has managed to pickup most of the courser waste material – and the skimmer sock continues to clean up the usually Baquacil gook! Test results as of today;

WT = 81 deg.
FC = 20 (~ same as 8:30 p.m. on Wednesday)
CC = 0.5ppm
pH = 7.6
Pump Pressure = 26lbs

Based on the above test numbers, and primarily with the CC <= 0.5 ppm, I decided to start the process of changing out the filter sand today – preceded by brushing, raising the water level, vacuuming, and taking a few photos as well.

Many “Thank You” to all of you on the PoolForum who have taken your time to respond to my posting – your comments, advice, and guidance is always appreciated,
Gene

[Watermom]

You are welcome! Glad we could help. You're going to be really glad you converted.