pH balanced at 7.5 while TA is 200ppm in a SWG pool

[prettyblues80]

What is the best way to lower TA when the pH is balanced, muriatic acid or dry acid? And will lowering my TA lower my pH too?
Test results as of 7/27/2020:
FC: 7ppm (coming down from SLAM)
CYA: 75
CC: 0
TA: 200ppm
pH: 7.5

 

[mknauss]

Any reason you need to? Is your SWCG scaling? If not, manage pH. TA will manage itself.

 

[prettyblues80]

@mknauss my SWG doesn't seem to be scaling up, but there are water spots on the outside of my pool. That's clearly a cosmetic issue and probably would happen anyway. Should I lower the pH to 7.2 (bottom of the range) or just leave it as is?

BTW, here is a picture of my beautiful water thanks to your excellent guidance.

 

[JamesW]

What is the calcium hardness?

 

[prettyblues80]

What is the calcium hardness?

CA tested at 260

 

[mknauss]

When your pH reaches 7.8 or 8, lower it to 7.4.

If the SWCG starts to shed any calcium flakes, then lower the TA. Otherwise, no real issue in leaving it be.

 

[prettyblues80]

@mknauss what should I be aiming for on FC for my SWG pool? I have seen 2-4ppm ranges as the recommendation, but pool math offers a range of 4-11ppm?

And what should I do with the mason jar of sodium bisulfate I have dissolving in pool water that I shouldn't add to my pool now?

 

[mknauss]

Use up the dry acid. Just do not use any more once that is gone.

Follow the FC/CYA Levels for SWCG pools.

With your current level at 7 ppm, that is great place to be. Set up your SWCG to create 3 or 3.5 ppm FC per day.

 

[prettyblues80]

@mknauss, this is probably a stupid question, but I see in my manual that my SWG generates 12 grams/hour. How do I convert this to ppm in order to know how much I should run the generator? Of course I will test it to make sure my FC doesn't fall out of range again.

 

[mknauss]

In Poolmath, there is a drop down list of SWCG. I believe yours is the Intex Krystal Clear. It matches your 12 gm/hr which is 0.62 lb/day.

What is the volume of your pool? Please add that to your signature.

 

[prettyblues80]

In Poolmath, there is a drop down list of SWCG. I believe yours is the Intex Krystal Clear. It matches your 12 gm/hr which is 0.62 lb/day.

What is the volume of your pool? Please add that to your signature.

@mknauss Volume is 10,492 gallons. I have added to my signature too!

 

[prettyblues80]

@mknauss I found where you were talking about in Pool Math. Under "Effects of adding" you can select the SWG and determine how much run time your SWG will produce in PPM increase! AWESOME!

I have my SWG running now. I will retest before I head to bed tonight and determine how much more it needs to run to keep me at 7.

 

[mknauss]

OK -- so using PoolMath; I would suggest you run the pump with SWCG on for 12 hours each day. That will create 3.5ppm FC in your pool volume.