I just took a water sample to the pool store so that I could use the results to improve my test color interpretation skills. The store measured my calcium hardness at 150 and recommended I add hardener. As I had learned on this wonderful site, I replied that since I have an above ground pool with a vinyl liner this was not an issue and I was happy with the 150 level. The answer to this was that the ideal calcium hardness doesn't entirely have to do with the pool surface, it's about what the water "needs". The salesperson said that the water needs calcium and if it doesn't have enough it will acquire it, suggesting that the water would leech it from the swimmers. I actually had to hold back a laugh. I wish at the time it had occurred to me to point out that to protect her bones perhaps she should never take another shower.
So my question... Am I understandig this site correctly, there is no need to tend calcium hardness in vinyl pools? Is there any consideration beyond pool surface that applies to maintaining calcium hardness?
As always, thanks for all the insight!
Above ground 24' 13,500gal
TA 80 --> working on it with pool calculator