Almost as soon as I put in the scale,metal and stain control from Walmart the water started turning blue and remained a really pretty clear blue for about 24 hours. When the kids and I got out of the pool this afternoon I saw the water was starting to get a small hint of green again (chlorine tabs had almost completley dissolved in the tray) so I thought maybe I had better go ahead and add more chlorine tabs to the skimmer. As soon as I did the pool turned back lime green again. What does this mean?