Hot Tub Forum
Original => Hot Tub Forum => Topic started by: H823Putt on January 28, 2008, 02:29:44 pm
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What is the difference between Total Alkalinity and Adjusted Total Alkalinity? I needed some supplies yesterday but my regular dealer is not open on Sundays so I went somewhere else. I brought a sample of water to be tested and was told everything was fine but my alkalinity is low at 55. I said ok, went home and when I looked at the test sheet, it had
Tot. Alkalinity - 100
Adjusted TA - 55
I proceeded to test my water with the test strips that I just bought and alkalinity was around 100.
How do you get adjusted TA?
Should I raise it from 55(on low side) or leave it(100 ok)
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3putt,
Your question got me thinking that I had saw the term adjusted alkalinity before. So I dug through a couple of books at work on disinfection/pH/Alk.
The only reference I could find was pretty long winded but it implied that a Alk measurement was taken twice, once from a representative sample (your water sample) . Then again after the pH had been adjusted to a known value in the test used it was pH 7, the alkalinity was then called "adjusted".
Sound like a load of POOP to me from a old book on water treatment, probably written by an engineer :P
I would just continue to do what you have been
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It's on the last page of the Taylor book - Table K (at least I think thats it)!
It has to do with the PH and CYA in a body of water.
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Vinny,
Your right, its the very last page of the Taylor book and it makes a lot more sense then the explanation I was trying to figure out.
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I'm really starting to think how I really need a life!