Constant muriatic acid required for proper CSI

[Nonyabiz]

See my chem values attached. My pool PH constantly wants to climb to 8.0. I’m adding 5-7 ounces 31.45% MA every 48 hours to keep it near 7.6.

I’ve read lowering TA to around 60 will help stabilize to 7.8 which is still higher than I would like, prefer a more neutral 7.5-7.6. Furthermore , lowering TA to 60 causes CSI to nearly fall out of acceptable range as seen in attached values. No waterfalls or spillovers, do have in-floor system though. Only use liquid chlorine and MA, no other stabilizers or algecides. Also, always keep CSI well within range.

Any and all ideas are welcome as this MA habit is getting more expensive than I prefer.

 

[ajw22]

Lower your TA to 50-60.

The lower you try to maintain a low pH the more rapid the pH will rise back toward pH/TA equilibrium.

Proper CSI is anywhere between -0.6 to +0.6 and preferably-0.3 to +0.3

PH TA Relationship - Further Reading

www.troublefreepool.com

 

[Nonyabiz]

Lower your TA to 50-60.

The lower you try to maintain a low pH the more rapid the pH will rise back toward pH/TA equilibrium.

PH TA Relationship - Further Reading

www.troublefreepool.com

So be less concerned with CSI compliance in your opinion? Lowering TA to 50 would throw me outside of acceptable CSI range

 

[ajw22]

So be less concerned with CSI compliance in your opinion? Lowering TA to 50 would throw me outside of acceptable CSI range

What CSI would you have?

 

[Nonyabiz]

What CSI would you have?

-.37 CSI with a TA of 50

 

[ajw22]

-.37 CSI with a TA of 50

That is fine.

That is with what pH?

 

[JamesW]

prefer a more neutral 7.5-7.6.

Why?

 

[Nonyabiz]

That is fine.

That is with what pH?

3-4 - Image attached in initial post with all current values. Thanks for all your help!

 

[JamesW]

Keep the pH at about 7.8 to 7.9.

 

[Nonyabiz]

Why?

Cloudy water, scaling, skin irritation

 

[ajw22]

A bit higher pH gets your CSI to -0.3 or above.

But either will work. You are splitting hairs. Your lower pH will not stay there for long.

 

[JamesW]

Cloudy water, scaling, skin irritation

None of those things will happen due to the pH being at 7.9.

 

[ajw22]

Cloudy water, scaling, skin irritation

Huh???

Any pH in the 7s does not cause that stuff.

Those are symptoms of other water chemistry issues.