Test Results are in :(((

Oh what I meant by shocking was using CalHypo.

Anyway last night I have used 2 lbs 56% CalHypo and let the pump run, this morning it is clean and clear :)
Due to lack of CYA chlorine from CalHypo tends to disappear by late afternoon, pool receives direct sun for at least 8-9 hours a day and I am in Southern AZ. But then I use it again same night (1 lb bag) and let the pump run. Meanwhile I am also using the tablets (TriChlor) to build up the CYA levels

Here are the test results as of 1 pm today (this after using 2lbs CalHypo last night after hit by a rain storm).

FC 3.8 ppm
CC 0.1 ppm
pH 7.6 (down from 7.8)
TA 120 ppm (unchanged)
CH 140 ppm (up from 110)

For the filter I have Clean & Clear plus 320 (pentair) with new cartridges.

Thanks
Matt

You'll want to keep using that Cal-Hypo or add calcium powder as you have a PebbleTec pool and your CH is still 60ppm under the recommended range of 200-400.

I'm pretty sure CarlD warned you earlier, but, I'll say it again since you are using trichlor and cal-hypo at the same time. Don't let undissolved trichlor and cal-hypo near each other.

@ Carl & Big Dave thanks for the heads up on cal hypo and trichlor.

As of today I have actually stopped using trichlor as my test results are ;

FC 1.6 ( this after staying under the sun whole day and last dichlor was added 48 hrs ago )
CC 0.1 ppm
pH 7.8
TA 100 ppm (down from 120 five days ago)
CA 170 ppm (up from 140 ppm 5 days ago, it is rising nicely, Doheny's CalHypo speeded up the process, used 3 lbs in 5 days)
CYA 35 ppm (black dot disappeared after 40 ppm but before 30 ppm so I am taking the average)

As of today I have stopped the trichlor, I was very surprised how quickly Pool Brands tablets was adding CYA. I have used probably about 10ea 3 inch tablets to bring it to 35 from 0, and it was not adding much chlorine. Now I guess I know why my CYA shot upto 200 pm before I drained the pool.

Plan is to continue with dichlor until I reach somewhere around 200 - 220 ppm CA and then to switch to bleach and add other Bs as needed. I will be checking chlorine and pH daily with dye based test and running full test about twice weekly.

I hope I can keep the pool in balance.

Thanks for all the help I've received from this forum, I really appreciate it.

Matt

I think you mean cal-hypo, not di-chlor, as di-chlor adds CYA faster than Tri-chlor. Di-Chlor does NOT add calcium, Cal-hypo does. If your CYA goal was higher (like for a SWCG or southern clime), the tri-chlor would be good as it would lower your pH as well.

FYI: Tri-chlor add about 6ppm of CYA for every 10ppm of FC, while Di-chlor add about 9ppm of CYA for every 10ppm of FC, but tri-chlor is much more acidic.

I did mean CalHypo :))

Since I'm southern Climate (I'm in S. Arizona) what should be my ideal CYA level ? Is 35 ppm too low ?

Thanks
Matt

Quote:

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Originally Posted by BigDave

BBB - it's not a recipe, just a catchy name for using only the chemicals your pool needs and finding them at reasonable prices

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Good explanation.

@ MattinAZ => 35 is pretty low. 80 will make things easier . . . IF you continue to use cal hypo. But if you use dichlor / trichlor, it will go up on its own, more than you need, so you shouldn't add any.