Calcium Hardness (CH) for Vinyl Pool Liners

[Spensar]

I bought my house 8 years ago with the pool. The liner was vinyl and 20 years old. The old owner hadn't done much to look after the pool and neighbours said they kept it from being green by tossing chlorine in it. What finally did the liner is was that it is a rectangular pool with square corners and the vinyl gave out at the corners. I have a very good pool tech that only does service, and doesn't sell chemicals and products, etc. and he inspected it when I bought the house. At that time he gave the corners 2-3 more years, and he was on the money.

Don't know if this adds anything to the discussion among the knowledgable here, just sharing experience with an very old liner.

[chem geek]

Thanks Spensar. Where you using bleach or chlorinating liquid the entire 8 years since you had the pool?

[Spensar]

Thanks Spensar. Where you using bleach or chlorinating liquid the entire 8 years since you had the pool?

Sorry, missed the question, so very late reply. 90% liquid chlorine, mainly calcium chloride and mainly at the beginning before finding this forum.

[AnnaK]

Late to this thread. If you're still interested in data points, here's mine:
+ 7 year old vinyl liner
+ have never added calcium
+ fill water has 52 mg CaCO3/L
+ pH 7.5
+ CYA 50 ppm
+ use 12% LC and trichlor

No damage, no wrinkles, nothing adverse to report regarding the liner. Some fading from sunlight - the area covered by the steps is darker than the rest of the pool.