do i need to raise my calcium

[Prepooler]

Hello,
I went to the pool store today and had them test my water just to compare to my test.They said I needed to add calcium.I thought tat if you had a vinyl liner you didn't have too.But the guy there told me if I didn't the water would leach it and cause wrinkles in our liner.What should I do?Here are my numbers. Thanks
FC 2.5
cc 0
ph 7.5
ta 70
cya 27 this is their reading
ch 40

 

[zea3]

Recommended levels in Pool School say you are good with CH from 50-300 with a vinyl liner. You said you were comparing test results. Did your testing show low CH also? It won't hurt anything for you to raise it a little if it will give you some peace of mind.

 

[Guest]

I always wondered what causes wrinkles; now I know :lol:

 

[frustratedpoolmom]

Yeah, they say alot of things.
To sell their chemicals, that is.