CSI too aggressive (TA)

[Tom09]

I know PH and water temperature have a huge part on CSI along with TA.

I finally did full test yesterday and realized the TA is 50. Playing with the calculator for the colder temps the water would have been aggressive when I dropped PH to 7.7.

Even right now as temperatures fluctuate 7-8 degrees, it throws csi further negative.

Playing with the calculator it looks like the best way is to increase the TA so I have some play.

Most say leave the TA alone but I’ll have to stay on top of the PH and not drop it below 7.9 ish to stay around -.3

Increasing the TA allows me to have a little more wiggle room.

The plaster is about 8 months old.

Thoughts on the best way to keep up with it?

The other calculations is I increased cya and salt yesterday.

 

[Bperry]

I know PH and water temperature have a huge part on CSI along with TA.

I finally did full test yesterday and realized the TA is 50. Playing with the calculator for the colder temps the water would have been aggressive when I dropped PH to 7.7.

Even right now as temperatures fluctuate 7-8 degrees, it throws csi further negative.

Playing with the calculator it looks like the best way is to increase the TA so I have some play.

Most say leave the TA alone but I’ll have to stay on top of the PH and not drop it below 7.9 ish to stay around -.3

Increasing the TA allows me to have a little more wiggle room.

The plaster is about 8 months old.

Thoughts on the best way to keep up with it?

The other calculations is I increased cya and salt yesterday.

You can add calcium instead of increasing TA.

 

[mknauss]

What is the TA and CH of your fill water?

 

[Tom09]

What is the TA and CH of your fill water?

Just checked,
TA is about 60-70
CH-100-125

 

[Tom09]

You can add calcium instead of increasing TA.

I always hated testing CH and was never confident on my exact numbers.

As I just posted our CH from the city seems low but differs from their posted numbers.

 

[Bperry]

I always hated testing CH and was never confident on my exact numbers.

As I just posted our CH from the city seems low but differs from their posted numbers.

The issue with raising the TA is that the pH will then rise even faster and FORCE you to keep adding acid to lower the pH (and TA along with it), which will lead you on and endless yo-yo of increasing TA and then decreasing it with acid. If you leave it alone, your CH will eventually increase along with temperature, and your pH will find a nice place to hover around 7.9-8.0. All that will keep the CSI in a good place.

 

[Tom09]

The issue with raising the TA is that the pH will then rise even faster and FORCE you to keep adding acid to lower the pH (and TA along with it), which will lead you on and endless yo-yo of increasing TA and then decreasing it with acid. If you leave it alone, your CH will eventually increase along with temperature, and your pH will find a nice place to hover around 7.9-8.0. All that will keep the CSI in a good place.

Are you saying let it be at this point?

I was thinking to just increase TA to say 65 to give me a buffer.

i was adding acid and dropping it to 7.7 and lower and having it increase but that was obviously too aggressive.

 

[Bperry]

Are you saying let it be at this point?

I was thinking to just increase TA to say 65 to give me a buffer.

i was adding acid and dropping it to 7.7 and lower and having it increase but that was obviously too aggressive.

I would leave it alone except let the pH stay in thr high 7’s. Chasing the CSI isnt providing any advantages.

Marty may have a different take.

 

[mknauss]

No need for chemical intervention. Your evaporation rate is increasing and you will be adding fill water at significant volumes. The TA and CH will move upward. You will be adding acid to control the pH due to the TA rise.

 

[Tom09]

Thank you both, appreciate your inputs.