Help !!!!!!!!!

[eddman]

To all

A correction on pool gasllonage. I was suing 41,00 as provided me by previous owner and just seemd off so I did some measurements and ran a calc and the gallonage is more like 36000. Not sure how much difference it will make just wanted to be clear and up to date with info.

Other things:

Just had a water sample tested at local supply store. I had the sample, puled at 9:45 am, to them within 10 minutes of taking it so should not have had much effect on test. They used some multiple vial(8-9) sealed vial test where they pipetted water from sample then did computer, apparently color analysis. They used 36000 gallons for size but a temp of 70 when actually it is more like 90. Anyhow here are there results (verbatim):
FC 0.2 ppm
TC 1.7 ppm
CC 1.4 ppm
pH 7.6
Hardness 250 ppm
Alkalinity (w/stabilizer correction) 101 ppm
Cyanuric Acid 30 ppm
Cooper 0 ppm
Iron 0 ppm

[madwil]

well, some good news- your CYA is ok, as is the hardness and alk...
Just need to work on the chlorine, and maintain pH!
Also good no metals!

[PoolDoc]

OK.

Low stabilizer; high CC, though I don't fully trust those values. I'd be more comfortable if I was looking at readings from an FAS-DPD kit. It's much more accurate than your dealer's 'goofy strips' plus electronic reader*. The Taylor K2006 is probably the cheapest; Amazon link below (purchase only if the seller is "Amato Ind" -- some of the others confuse the K2006 with the K2005).

Anyhow, the way to remove the bromide -- according to Jock Hamilton who started United Chem -- is repeated shocks + sunlight. So, repeat your bleach doses nightly. That should be enough to eliminate any lingering algae and clean up the CC's. Hopefully, it will also convert the bromide to bromate.

By the way, the chlorine drop during the day, suggests your cover isn't blocking as much UV as you thought. It's something to check -- you may need more stabilizer than you thought, too. If you get the FAS-DPD kit, you can find out.

Meanwhile, you need to think about how you want to operate your pool -- low CYA; high CYA, or salt.

Is this your first year with the pool? How have you done it before?

Ben


* All those decimals in your dealer's results are normally bogus. You can check this for yourself, by collecting two samples at the same time, and telling your dealer that you've been losing chlorine overnight, but need a more accurate measurement of how much. (True; it's what the FAS-DPD test is for.) So you have two samples collected from the same pool, but at different times that you need tested. (Also true; just don't tell the dealer the two times were only a minute apart!). Typically, you'll see widely varying results from the same water sample.

[eddman]

Appreciate all the advise and will do the shock.

This is 3rd year with pool and normally just chlorine (bleach/ di-chlor/tri-chlor) and shock as needed.

this year started out with nasty algae bllom as there were issues related to potential leak and couldn't run system, just dump chlorine..too long a story.

I 'll post follow up soon.

[eddman]

Just wanted to tell everyone I have been following the advise and last night I shocked the pool with 942 oz of 6% bleach and an hour later I had FC well in excess of 5ppm and FC >10. Checked again this morning and same readings. Now if it holds high till this evening all will be good.

[CarlD]

"I had FC well in excess of 5ppm and FC >10"

I don't know what this means. Is FC in excess of 5ppm or greater than 10ppm?

Car