I think our pool needs calcium. We have pebble tec and it is becoming a bit white in certain areas could it be that we need calcium, and it is drawing it from the gunite? Our pool is about 15,100 gallons and my cal is reading at
120. I read other post on how to raise it with some deicer product, but is there a calculator or some other way of finding out how much to add? Thanks a bunch in advance.

Elsa