We have a salt water pool and I am getting very confused about the calcium hardness. We are finding calcium granules in our filter and some flakes that shoot out the returns. The pool store tested them and said they were calcium. The pool store told us to add acid to lower our ph which was 8.0 at testing. They also told us to add metal binder to lower the calcium levels which were 320ppm. According to your chemistry/pool chemical info you state that a swp should have calcium hardness levels higher than this. I understand that our acid levels need to be stabilized but it sound like we need to be adding calcium not trying to bind it up. Are we causing damage to our pool walls? Help!!