how slow can slow be

[engrav]

Hi again
is cool here in W Washington, a little sun now and then, pool is covered, water is clear
on 10/2 was using K-2005, diluted pool water 1:4, and found FC 2-3, so then 8-12ppm
have added no bleach and Rainbow is set to zero, ie closed
today 10/15 the chlorine test kit arrived from http://tftestkits.net/Single-Item-Tests-c6/
and returned FC 12 and CC 0

is it possible that FC has not declined for 13 days?

 

[duraleigh]

is it possible that FC has not declined for 13 days?

No, that's not really possible.

The problem is likely in your dilution. Each time you dilute the accuracy gets thrown way off so a 4:1 dilution is pretty meaningless.

Go forward with your new FAS/DPD test and you'll be fine

 

[engrav]

is it possible that FC has not declined for 13 days?

No, that's not really possible.

The problem is likely in your dilution. Each time you dilute the accuracy gets thrown way off so a 4:1 dilution is pretty meaningless.

Go forward with your new FAS/DPD test and you'll be fine

thank you

will follow with the new test kit and see what happens over the next days weeks and report

is kinda fun not having to add bleach / tabs

maybe I have a spontaneous source of Cl (dead worms, Puget Sound rain, old plaster, deer pee) :-D

 

[y_not]

It's that deer pee that'll do it! :-D

 

[engrav]

so have new test kit
10/16 FC 12.5 (10cc, 25drops)
10/25 FC 12, CC 0, pH 7.6, TA 60, CH 240, CYA 50 (10cc, 24 drops)
still cool, cloudy, covered
so in 9 days drop of FC essentially zero
so am nervous
is this Ok or
am I about to see yellow water

 

[JamesW]

If there are tabs in the feeder, you might get some chlorine from the feeder even with it set to zero.

 

[linen]

Pool is covered and there is no swimming? Combine that with cold water temps and your FC can last a long time since the chlorine is not being used by the sun or organics. It won't last forever, but could last for awhile.

Also, when you did your previous dilution of 1:4 (1 part pool water combined with 3 parts non-chlorinated water?) your uncertainty could easily have been higher than +/-4 ppm due to the precision of that test.

 

[engrav]

so the test continues

pool clear, covered
weather cloudy cool
10/16 FC 24 drops 10 cc; CC none
11/5 FC 24 drops 10 cc, CC none

will continue to follow

 

[jblizzle]

So does that mean 24 drops into 10ml sample so your FC is 12ppm?
If so, just report the ppm

 

[engrav]

so the tracking of FC decline continues
FC was 12 on 10/2 and 9 today 12/4
so declined 3 in two months

also
troublefreepool chlorine tester is cool
what do I vac up in the winter? leaves worms and one rat, but very little stuff as back wash is very clean
pH continues to creep up and I bump down with acid every so often (TA 60); why does pH creep up?

 

[Smykowski]

What's the water temp? As temp falls, the pH will go up.

 

[engrav]

41 but
it creeps in the summer as well
seem to always be adding chlorine and acid (tho not chlorine now)

 

[duraleigh]

The pH tends to rise in most every pool. More so in an SWG pool. It's the nature of the beast as the TA slowly outgasses.

Chlorine, of course, is a consumable item and you will be adding it for the rest of your pool's life.

 

[linen]

41 but
it creeps in the summer as well
seem to always be adding chlorine and acid (tho not chlorine now)

What is your TA? Higher TA will cause quicker ph drift up.

 

[Smykowski]

41 but
it creeps in the summer as well
seem to always be adding chlorine and acid (tho not chlorine now)

I'll let ChemGeek correct me if I'm wrong, but the pH changes are for two different reasons. In the summer, temp is relatively constant but pH changes anyways - high TA, outgassing/aeration, the effect of the SWG, etc. In the wintertime, there are no appreciable changes to your pool water except for temp, and the pH is changing because the temp is changing.

 

[engrav]

end of experiment, how slow can slow be
FC is now 7, took 3 months to drop from 12

 

[pwrstrk]

With pool covered and cold water temps I think that is good. What is your water temp ?

 

[engrav]

With pool covered and cold water temps I think that is good. What is your water temp ?

Hi

39
too cold to put your hand in it, have some shoulder length gloves with liners that crabbers use in AK

 

[engrav]

What is your TA? Higher TA will cause quicker ph drift up.

[/quote]


TA is 60