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


Postby di2156 » Thu 29 May, 2008 12:12

I have a high alkalinity level in my 20X40 in ground liner pool
every thing else is normal
How do I bring the alkalinity level down without changing the other readings?
New pool owner

chem geek
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Postby chem geek » Thu 29 May, 2008 16:07

Follow the procedure in this post. The key is to strongly aerate the water at low pH and then add acid to keep the pH low and keep aerating. It takes a lot of acid, but it would take that amount of acid no matter what you did -- the aeration at low pH just speeds up the process of outgassing carbon dioxide from the pool which is how TA gets lowered. Pools are intentionally over-carbonated so you are essentially just stirring up or blowing bubbles into a carbonated beverage to make it go flat faster (and adding acid that also speeds this up -- think of what happens when you add vinegar, which is acidic, to baking soda).

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