We complained so the installers drained the newly filled pool (40,000 gals!) and acid washed twice to improve things. We filled the pool,on their word the mark would disappear after a few days. It did look slightly better at first, but in a couple weeks it was obvious the problem was not solved so we contacted PT out west. They assurred us they would make it right but couldn't come to Pensylvania until the end of the summer. They made us drain the pool for their 'expert' from Arizona to acid wash it a third time. It looked greatly improved, we filled it, and although we could still see the long mark, we figured no one else would ever notice and it was good enough. We left it with PT that as long as the mark didn't deteriorate again we would accept their remedy. This summer we noticed the mark reappearing and it is now back as strong as ever.
We're afraid to acid wash again or make Pebble Teck tear it all apart (although we will if we have to) and we wonder whether anyone else has had this problem and what you did about it.
We also notice a kind of mottling or wavy discoloration going on in the shallow end floor that looks like an algae shadow but isn't. It looks like greenish/brownish shadows on the floor of the pool - dramatically different from the midnight blue everywhere else. Any ideas?
