lowered my PH for high alkalinity......alkalinity still too high

[g4string]

I checked my pool on monday. My PH was 7.8. I didn't personally check the alkalinity. But the pool builder said it was 100. I added muratic acid to lower my PH to 7.0-7.2 per the pool math calculator. I checked again today, PH was right on target at 7.0, but my alkalinity was at 110. I did make the mistake of not turning my pump when adding my acid. Did this cause my alkalinity to not drop? What am I missing here. Why did my alkalinity level not drop to 70-80 range?

 

[kul]

The pool builder might have been incorrect. Did you also confirm that it was 100?

 

[Newdude]

String........ disregard anything the PB tests. Unless he took a sample to the shop and used the questionable machine, it was a test strip. Either way, trust yourself.

Each round of PH drop / aerate back up lowers the TA 10. You lowered but didn't raise it yet. A 110 can be fine. A 100 is totally fine and will settle on its own as you manage the PH.

 

[pjt]

I did make the mistake of not turning my pump when adding my acid.

You should always slowly pour acid (pencil stream) in front of a return with the pump running.

Acid - Further Reading

www.troublefreepool.com

I didn't personally check the alkalinity.

Always check it yourself with a proper test kit. How are you testing? Fill out your signature when you have a moment.

But the pool builder said it was 100.

How is he testing? Many builders are clueless regarding pool chemistry.

Did this cause my alkalinity to not drop?

No.

 

[Jimrahbe]

g4,

Reducing your TA is a process over time, not a onetime deal.

TA is the last thing that I even think about as long as my pH is somewhat stable.

Lower Total Alkalinity

A lower Total Alkalinity level can help a pool owner stabalize their pH increase. We'll explain how to lower TA with a little help from muriatic acid.

www.troublefreepool.com

Thanks,

Jim R.