First time test results for pool

[tbatti]

Hi: I have been a long time reader of the forum. Only posted a few times due to all of the great information in the archieves. I have recently moved to a different home in Florida with a pool and have the following test results. I have a question on the Calcium test. Seems very high. The regents for the Calcium test are about 2 years old. Kept inside the house. The previous pool owner left 1 gal. jugs of Pool Time Algicide 10% (dimethtl benzyl ammonium chloride) and packets of powdered "Pool Shock". I guess that explains the high CYA . Can this Cal test be accurate?
Thanks!


FC- 13 ppm
CC- 0 ppm
TC- 13.0 ppm
ph- 7.8
Cal- 820
CYA - 100+

13,500 gal

[CarlD]

First thing to do is order fresh reagents. You can get test strips to VERIFY your numbers or take a sample to a pool store and have it tested.

If your numbers are true (and I think they are), the only problem you have is high calcium. THAT is probably due to the "shock" if it's Cal-Hypo. But if it's Di-chlor shock that explains the high CYA. But since your residual FC is 13 and you have no CC, that's fine--keep it at those levels.

But the high calcium can precipitate a white cloud if your Total Alkalinity rises.

I'd test my fill water and if it's calcium free or very low, I'd drain half the pool and refill. That should also put your CYA level much lower too.

[tbatti]

Thanks Carl: I need to re-order FAS/DPD reagents, so I'll add the Calcium reagents to the list and retest. I'll also keep an eye on the TA.