It was a guy at a pool store who got it wrong and the poster at tfp knew that tried to explain to the pool store person what a hydrocarbon was i e.
Calcium hardness vinyl liner pools.
For vinyl pools calcium should be between 150 250 ppm.
Truth be known vinyl liner and fiberglass pools are likely to decline faster in a low calcium environment.
Calcium hardness is also very important to the chemical balancing of your vinyl liner swimming pool.
Calcium hardness ch for vinyl pool liners no one at tfp was mixing anything up.
High calcium is rarely a problem if other lsi factors are adjusted properly 500ppm calcium hardness is easily managed without scale formation.
If you have a concrete or plaster pool keep the level between 200 ppm and 275 ppm.
A low level can result in foaming which is unpleasant but shouldn t harm the liner.
If a vinyl liner s calcium level is too low this soft water situation could lead to foaming and other water problems and can harm the vinyl.
If calcium hardness goes above 400 ppm you will likely see a white flaky crust on the liner and pool equipment.
It also produces itchy skin.