steps to getting pool chemistry right

[marciastz]

In what order to adjust these numbers? What are the targets that I'm working towards? My pool is a 25,000 gallon inground, sand filter.

CyA 30
PH 6.8 (yellow)
Alk 20
CC 2

[Themadczar]

You need to raise the ph and get the cc below 1. Not sure about your test kit, but most of the time anything below 7 could be what you read or it could be significantly lower. Use the Best Guess chart and shock your pool until 1) water is clear, 2) cc is 1 or less, AND 3)you don't lose more than 1 ppm of FC overnight. Once that's all stable, you can raise your cya if you want. I always kept my pool around 50 ppm cya. As for alkalinity, that's the last thing to work on. Make sure the others are good first.

[FormerBromineUser]

I agree! I would also suggest that you consider using arm and hammer WASHING SODA (about 3 cups to start) to raise both pH and TA and see where you are.

Did you mean you have a CC reading of 2 or a chlorine reading of 2? How does the water look?

[FormerBromineUser]

Forgot to add targets:
CYA: 40-50 depending on how much sun you get
FC: 5-6 corresponds to above
TA 50 (alk)

[Anonymous [GDPR] European in the UK]

The TA will change as you raise the pH so wait, The pH will also raise as you add more chlorine so wait also if the pH is stable don't worry about the TA at all with a vinyl liner. I run my pool with a TA of around 30ppm as the pH is very stable at that level.
What is your calcium hardness?
So get your chlorine up to shock level to oxidize out the CC, which should be 0 to 0.5ppm