PH going up again!

[Mr.Mooks]

The thing I find weird is that my PH went down with my addition of Muractic yesterday but my Alk went up by 9ppm. Is this because of not enough airation? I only have one jet to use for this. If I add more acid will my PH not drop even more? Don't want my pool to be a chemical sess pool!!!

[Watermom]

I don't think your alk went up with the addition of muriatic acid. Yes, if you add more acid, the pH will go down further. What is your pH and TA now?

[Mr.Mooks]

On Friday my PH was 7.9 and Alk was 167 ppm then I added 1/2 gallon of Muratic and 1/2 Gallon of liquid CYA got another test Saturday and the PH is 7.4 and Alk was 176.

[aylad]

My guess would be faulty testing....but you could verify that by testing same sample from two different stores.....

Janet

[Mr.Mooks]

That is likely. I have put in the CYA in a sock so I am waiting for it to dissolve. I think I will add 1/2 gallon of Muratic tommorow and then I wait a few days and get another test. All I am realy trying to acomplish is to lower the runtime and percentage on my SWCG so it will last a few years. Everyones help on this site has been awesome. Thanks to all. After next test I will post results and proceed with the suggestions I receive here.

[waterbear]

It is definitely testing error (or more likely, the normal variance from the precision of the test.) You numbers look like their are either from a strip reader or colorimeter. If they are from a strip readier they are just not to be trusted. If they are from a colorimeter such as the LmMotte Waterlink system they are in spec because, if my memory serves me correctly, the LaMotte UDV TA test has a precision of +10 ppm / - 20 ppm for a variance of 30 ppm. (The Taylor titration test, which does not use any fancy meters is actually ore precise with a precision of +/- 10 ppm!)

[Mr.Mooks]

Thanks Waterbear. Not sure what the test is but no strips are used. My water sample goes into about 6 if not more little clear vials with couloured lids on them. Then they are put 1 at a time into a little red box connected to a computer. After a few minutes they give me printed results. If I can get through this season this way I will purchase a taylor kit throughout the winter. With all the install and setup costs with the pool cash is tight. Thanks everyone for all your help. I will post test results ina few days after CYA have dissolved. Then again I will call on your guideance.