Copper sulfate instead of chlorine

[prop]

i had a bad problem down here in mexico with hard water.the pool would turn green when i added chlorine. now i use copper sulfate and the water is crystal clear and i hardly use any chlorine at all.it is a cement pool and i`m wondering if i can use the same method in my pool in ny.it has a vynal liner.

[zoolof]

Copper is not a sanitizer or oxidizer and is definitely not a chlorine substitute. Small amounts of copper will help the chlorine by killing algae and bacteria, but too much can make stains on the pool surfaces.
Use with caution!!