CH in a vinyl lined pool

[CarlD]

Calcium can be anything from 0 to 400 in a vinyl pool. Calcium is solely to protect the calcium in plaster, concrete or mortar. It is useless in vinyl pools. I test twice a summer just to make sure the CH isn't too high. Period.

[beaverplt]

That's good to know. I'm on a well and have an iron filter and softener before the pool faucet. The CH of that water tests at 250, so I know we're not adding calcium to the water. I have some scale on the liner left over from a major problem two years ago. I'm slowly getting rid of it, but wasn't sure if a lower CH would help. Everything I've read says the only way to lower CH is replacing water.

[CarlD]

Pool stores will swear on a stack of scriptures you need calcium in your vinyl pool. You don't. A CH of 250ppm is just fine.