pH keeps creeping up

[chem geek]

mariner09,

Yes, you can keep your pH at 7.8. The only downsides are a slight possibility of being more drying or stinging on the eyes since it's further away from the 7.5 that is around the pH of tears, but even that pH varies by person so I think you'll be fine. The other thing is that chlorine is a little less effective at that pH, but not by as much as the "traditional" industry graphs say because CYA helps to buffer disinfecting chlorine concentration. It's only around 10% less effective, so just bump your FC target up a bit to compensate.

You can lower your TA to around 80 to see if that helps. Then use 7.7 or so as your pH target after you've lowered your TA and I think you'll find a huge drop in the amount of acid you need and some drop in the rate of pH rise.

Amir,

No, I didn't move any of the charts and the link works for me right now and I don't have it protected in any way (i.e. it's visible throughout the world). Do you get an error message like it's a broken link? Does anyone else see that problem? Here are some links to various charts and graphs:

Free Chlorine Chart
Disinfecting Chlorine Chart
Outgassing CO2 Chart
Rate of pH Rise Chart
Chlorine Half-Life Graph (will be changed in future)
Disinfecting Chlorine Graph

Richard

[Amir]

Richard,
your links don't work! Would you please repost the links.
Regards

Amir

[fcfrey]

Richard / Amir

I just tried all of the links --- They work just fine. The first 4 are statistical charts not graphical but if you are skilled in Excel you could convert them if you wanted to. The last 2 links are logrithmic graphs.

All these should be Printed, Framed and kept where you can refer to them regularly. They are EXTRE E E E E MLY useful.

Quick related question for Richard, does aeration reduce pH along with TA?

Frank

[Amir]

Frank,
You are right! they work in internet Explorer but not in Firefox! I am not a big fan of microsfot so Firefox is what I used first and tried IE after your post.
Regards

Amir

[chem geek]

Amir,

I use Firefox on the Mac and the links work fine so this must be something specifically wrong with Firefox on a PC -- very strange.

Frank,

Aeration only causes the pH to rise by the outgassing of carbon dioxide. It does not change the TA. When you add acid, then that lowers both pH and TA so the combination of the two is a net result of lowering TA. Carl explains this here and I have a chart about this here.

Richard

[fcfrey]

I don't know why I said "lower pH" I knew that it didn't do that. DAH!!
Thanks Richard,

I checked my pool test log spreadsheet from last year and the year before that and I see where we had a very minimal amount of pH rise last year unless there was rain or "rug rat" activity, but then it seemed to stabilize without acid addition. I will watch it for a while to see where it goes.

I will be discontinuing the use of the Bleach pump for a couple of weeks while I use some pucks to get the CYA up to 30. Right now it is below the capability of my test equipment but I believe it is around 20 ppm. If the pool is uncovered all day the FC depletion goes to around 3-4 ppm so I think a bit more CYA will be in order.

Thanks for your thoughts on the pH, after searching and finding a lot of pools getting several pints a day, I do not feel too bad.

By the way, NO!! I do not add anything surrepticiously that Jakebear is unaware of (See post #8).

I value my life

[mariner09]

I also use Firefox 2.0 on Linux and the links display just fine.

[Amir]

I run firfox on PC. I even copy and pasted the link
http://richardfalk.home.comcast.net/pool/FC.htm
and got "can not find server"
I can get to his site
http://home.comcast.net/~richardfalk...tml--logo.html
but not to the links with firefox!!
amir

[chem geek]

Amir,

Just for the heck of it, I duplicated the FC.htm file and changed the name to FC.html so see if this link is accessible. If it is, then Firefox on the PC requires the extension to be "html" instead if "htm". Let me know.

Richard

[nikonsal]

I am running Firefox v2.0.0.2 on a pc and I am able to pull up the pages that only have the .htm extensions.