HELP!!! We put in an above ground pool 4 years ago..we decided to use Pristine Blue because we heard it was safe and harmless for the kids..So we did..The product has worked GREAT! The water is crystal clear...We started to notice brown spots on the bottom of the pool about season 2. Not much of a problem yet..This is season 4- when we opened this spring the water was PERFECT and no brown spots- I was so relieved..Now July 13th OMG Huge brown spots all over the bottom..When I put chlorine on the them they fade. It looks awful. What is this from??? Fungus coming up from under the liner??? Why wouldn't they be there when we opened it and NOW they are everywhere...I am so embarrassed to have family over. I'm thinking about going to faithful chlorine.
Thanks for any help!!!!!!!!!!