Question on CC reading

[jstblush]

Hi all,
Good to be back for the summer!

I was just wondering about a CC reading of 1. This morning at 11:00 a.m. I checked and my numbers were:
FC 2
CC 1
TC 3
CYA 40
PH 7.5
CH 100
TA 80

So I added my bleach to get my FC up to 6 and checked it again at 1:10 p.m. and it was up to 7.5. So I overshot it a little bit. but that's okay. Then I checked for CC's and got 0. So I am a little confused. Do I need to SLAM or not since the first reading was 1 and the 2nd reading was 0 after adding bleach?

Sherry

 

[Richard320]

If you just pulled the cover off, that CC is normal and expected because it was trapped underneath. If you had a big swim party yesterday, especially one with a lot of kids or drunks with weak bladders, it would also be normal.

The best way to be sure you have an algae problem -- or not -- is with an Overnight Chlorine Loss Test. Yeah, it's no fun setting the alarm before sunrise on a holiday, but you can go right back to bed after.

 

[jstblush]

Thank you Richard.

We just opened the pool on Wednesday and there has been no swimming yet. The solar cover was on it when I took the sample water for testing the first time today. Then, put the bleach in, checked later and no CC's. So maybe I will do the OCLT like you said tonight just to be sure.

The water is crystal clear so that's a good thing.
Thank you so much!
Sherry