Strange test results, help!!

[lisak]

That's what I thought. 21 is at or above shock level, correct? I don't need to add anything at this point? Thank you.

[Watermom]

Run your pump 24/7 and keep an eye on your filter pressure. Try the DE. It may just do the trick. Remember that it sometimes takes a little time for the pressure to rise so give it at least a half hour after you add it before deciding to add more. The first time I added DE to my filter, I didn't want wait long enough before adding more and then my pressure shot way up and I had to backwash it out and start over.

[aylad]

21 is at or above shock level, correct?

Yes, your shock level for a CYA of 45 is 15 ppm. See the "Best Guess Chart" here http://www.poolforum.com/pf2/showthread.php?t=365 that we use as a guideline for shock/chlorine levels, based on your current CYA levels.

Janet

[lisak]

I want to thank you all for your help. The pool is looking much better. Still a little dead stuff on the bottom but I can clearly see the bottom of the deep end. Still not as clear as it normally is but I can see the light at the end of the tunnel. My numbers this morning didn't change.

FC 19
CC .5
pH 7.2
Alk 110
CYA 45
Cal 80

I am thinking that by the time the chlorine level gets down to the correct amount, the pool should be clear again. Added the DE last night. My giggle for yesterday came from the pool store down the street. They told me they don't stock DE because it is toxic but they stock a "pool store equivalent chemical". Didn't even ask what that cost, I'm sure it is at least triple the cost of DE. Called my dad the chemical engineer to ask if DE is really toxic as I hadn't heard that one before. After he got done laughing he said nope. Gotta love pool stores.

[Watermom]

Watch your filter pressure and backwash when it rises 8-10psi over clean filter pressure. Then, you'll need to reload the DE as it will backwash out. Also, run the pump 24/7 while you are trying to clear it. Glad it is looking better.

[lisak]

Pool looks great, thanks for your help! In wandering through the posts, I see numerous replies about how much bleach will raise the chlorine level 1ppm. Is there a chart for this? If not, what am I looking at for a 23000 gallon pool? I checked stickies and searched but maybe I missed it. I can't download the bleach calculator as I have a mac (i tried, it was interesting...). Thanks again.

Lisa