PH keeps raising in spa!

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  #1  
Old 06-17-18, 01:45 PM
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PH keeps raising in spa!

Yesterday’s readings were PH 8.3+ Alk 200
Added 6 Tbl of muriatic acid dropping PH 7.2 & Alk 140.
Today PH 8.3 added 4 Tbl of muriatic acid dropping PH to 7.2
Bromine in the 2’s - OK
Hardness 200
Any idea what causes PH to keep rising?
thanks!
 
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  #2  
Old 06-18-18, 08:52 AM
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Found the answer! Running the pumps and blower injects air, the air causes PH to raise.
Took 22 Tablespoons of muriatic acid to get TA down to 50. A good article!
https://www.troublefreepool.com/thre...-%28or-pool%29
 
  #3  
Old 06-18-18, 10:28 AM
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Yes, it's a problem with spas. The jets and ozone generators cause the pH to climb over time. I suspect your alkalinity is too high. Once you get the alkalinity down where it should be you'll find that the pH stays where it should much better.
 
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