Calcium Hardness (CH) for Vinyl Pool Liners

[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.