My readings, what should I fix first?

[Basco]

Hello all, I have a 15,000 inground plaster pool and here are my readings:

FC 6.0
CC 0
TC 6.0
PH 8.0
TA 130
CH 140
CYA 60

I see my PH and TA is a little high while my CH is low. Which should I try to fix first? I am thinking CH, what would be the best way to raise it?

Thanks!

 

[JasonLion]

Start by lowering your PH. PH should ideally be maintained between 7.4 and 7.6. Try to always keep PH between 7.2 and 7.8. Lowering PH will also bring your TA down a little, which is good. Muriatic acid is best for lowering PH, but dry acid/PH Reducer/Lo N Slow is also fine.

You should also raise CH to between 200 and 300. This is most simply done with calcium increaser from a pool store. You can use calcium chloride, sold as an ice melter, but it has gotten difficult to find in sufficient purity for pool use.

Other than that you are looking good.