Using lots of acid

Fishy1234

Bronze Supporter
Jul 6, 2018
108
Apple Valley, CA
Since the beginning of summer, I have been adding 1 gallon of acid every 2 -3 days. I add a gallon of chlorine then next day I have to add acid. Ph was 7.4 yesterday today it's at 7.8. So today I added another 3/4 gallon acid. Probably using 2-3 gallons of acid weekly.

My pool has a spill over from elevated spa, and an ozonator, no other features. What could be causing the high acid requirement?

FC 7, CC 0, PH 8, Alk 80, CH 450, CYA 60,
Using Taylor k2006.

After adding Acid and running pump for 3 hours I went to pool store and got some really off results. FC 7.5, PH 8.0, ALK 130, CYA 40, CH 225, TDS 1600.

USING New test strip
PH 7.2, Alk 80
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
22,404
Laughlin, NV
Your fill water most likely has a high TA. Your evaporation means you are using a lot of fill water.

What strength acid are you using?

Liquid chlorine is pH neutral.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
10,408
Northern NJ
Ignore the pool store and test strip tests. They are worthless.

Your spa spillover is the likely contributor to your rapid pH rise. The spillover creates aeration that raises pH.
 

Fishy1234

Bronze Supporter
Jul 6, 2018
108
Apple Valley, CA
Older pics but you can see the opening where water flows out of spa and into the pool.
I am using 10% liquid pool chlorine, and 14% pool acid from home depot or Lowe's. 12lb bags of Baking soda from Walmart.
When Alkalinity drops to below 70 I add the baking soda, and 1 bag brings Alkalinity up to 100. However then I find my pool goes crazy needing more frequent doses of acid to keep PH down.
 

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frogabog

Gold Supporter
LifeTime Supporter
Jul 16, 2010
2,833
Portland, Oregon
Look for the 31% acid. It's twice the potency, usually the same cost.

Leave TA at 70 and see if your pH doesn't rise as fast. 70 is fine, just watch your CSI in Pool Math (subscribe and turn on "share with TFP" so we can see your logs). Turn off the spa spillover when you don't need it spilling. Aeration raises pH.
 
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Fishy1234

Bronze Supporter
Jul 6, 2018
108
Apple Valley, CA
Look for the 31% acid. It's twice the potency, usually the same cost.

Leave TA at 70 and see if your pH doesn't rise as fast. 70 is fine, just watch your CSI in Pool Math (subscribe and turn on "share with TFP" so we can see your logs). Turn off the spa spillover when you don't need it spilling. Aeration raises pH.
I have never seen the acid any higher than 14%. The spillover is built in. Somehow builder has the electric valve cammed to stop halfway between pool and spa.
 

wireform

Silver Supporter
In The Industry
Aug 15, 2017
450
Spring Valley, NY
Lowes has the acid in the paint department. I think it goes by the name JASCO. They carry two strengths. Check the label and get the one that is if I remember correctly about 31 or 34%.
 
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ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
10,408
Northern NJ
I have never seen the acid any higher than 14%. The spillover is built in. Somehow builder has the electric valve cammed to stop halfway between pool and spa.
It may be a California thing. Last half of this thread discusses it.


You can change the cam and adjust the Spa return valve. What automation panel do you have? You need to enable your SPILLOVER mode on your automation.
 
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Fishy1234

Bronze Supporter
Jul 6, 2018
108
Apple Valley, CA
It may be a California thing. Last half of this thread discusses it.


You can change the cam and adjust the Spa return valve. What automation panel do you have? You need to enable your SPILLOVER mode on your automation m
It's a pentair panel.