Calcium Film?

[Watermom]

I recently had a major rip in my liner and thus had to replace it. I was surprised to find out that when the pool was drained, my liner was totally white when it was dry. When it was wet, it was blue. I could rub and have a white chalky substance on my fingers, so I know it was calcium. This was surprising because my calcium hardness reading has always been very low - like around 100. At any rate, since I was replacing the liner, I didn't try and remove the calcium, so I can't help you there.

[waterbear]

does it look like wet tissue paper? If so it could be white mold which is commen in pools running biguinde for a few years.