PH keeps lowering


Mar 24, 2016
Horizon City, TX
Last year I constantly had to add MA to lower my PH. This year it keeps lowering? So far all I'm doing is aeration to keep it up. Should I just add baking soda? Will that be more permanent?
FC 4
pH 7.0
TA 70
CH 850
CYA 70
Use a SWG , temperature is very warm usually 90 to 95. Thank you.


Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
Laughlin, NV
pH will not drop unless you are adding a chemical or you are adding acidic water.

What other chemicals are you adding?

With your high CH, you want to keep the pH and TA low anyway.


TFP Expert
Mar 2, 2011
Any chance that you accidentally added acid when you thought it was liquid chlorine?

pH really doesn't drop on its own. Have you added any cyanuric acid recently?

Are you sure that the pH test reagent is good and that you're doing the test correctly?

What are the pH and TA of the fill water?