Thanks for all of yoru help. I will post tomorrow as to the condition of the stains and go from there. I placed an order from the chemistry store for 2# of ascorbic acid. They are a 2 hour drive from here and I would go pick it up if I had the time but it's just impossible since I am the single mom of an almost 2 year old. At any rate it shouldn't take long for it to get here since they are so close. If I still have stains we can try again. I'm determined to have a sparkling pool!!!!