Increasing Calcium Hardness

[rdbrya1]

Thank you Carl! It won't get behind the liner...for some reason the first thing that came to mind was reading something on here about the liner having little particles of something (calcium?) built into it that it would draw out (very rare). Sounds crazy to me...off to find a friend who has a concrete pool to give this stuff to :-) Thanks again!

[CarlD]

The liners are frequently made from whatever sheet vinyl in the right thickness the manufacturer can find. There is SOME discussion that some may have calcium in them but we have never seen a case of a vinyl liner deteriorating because of too little calciium in the water.