Is there ever a time when calcium needs to be added to a pool with a vinyl liner?
First off, this is not a question for my pool. I am having a discussion with my son-in-law who said the 'give me all your money for any non-neccessary chemical I can sell you' pool store person told him he needed to add 4 pounds of calcium to his pool that he just had a new vinyl liner put in. This doesn't sound right to me, so I decided to post the question to the forum. Does the calcium need to be raised to a certain level if you have a vinyl liner?