Problems relating to pH and total alkalinity.
Increase ph, increase TA. Reduce pH, reduce TA.
pH chemistry advice and techniques for the pool.


Postby griffb1968 » Sun 27 May, 2007 14:59

whats the reason for high TA.


Re: TA

Postby me_too » Mon 28 May, 2007 09:45

griffb1968 wrote:whats the reason for high TA.

A couple of things from the top of my head:

(1) Pool owner added to much sodium bicarbonate, error in calculating quantity to use or wrong pool volume (been there, done that);

(2) Using well water: high in CO2 content from decaying organic matter. This high CO2 content increases the bicarbonate content:
CaCO3 + CO2 + H2O -> Ca+2 + 2HCO3-

(3) Using sodium bisulfate as a method to increase pH, this also increases TA;

(4) Failing to adjust TA figure to take into account a high CYA (CYA is another buffer system and when high enough it may influence the TA test);

If I think of anything else I'll post back.

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