We have struggled with getting our pool clean all summer so about 10 days ago we completly drained the pool and filled it with fresh water. It was clear and we could see the bottom until we added the shock and chlorine tabs then the water turned lime green and the shock turned brown on the bottom of the pool. The first pool store said to add a balance pack, algecide (even though no algea) and some PH adjuster but this didn't help. The second pool store had us go through a three day process of shocking, adding phosphere free ( to get rid of phosphates) and then 20lbs of calcium saying it would then clear up but nope it's still lime green. We can clearly see the bottom atleast but anytime we add shock it turns brown and we can see it on the bottom of the pool and the water stays green. Last year we had to put something in the pool to get rid of metals since we have well water and we had no problems all last summer. This year both pool stores had stated there are no metals in the water. I finally went to Walmart today and poured in two bottles of the scale, metal and stain control just to see what happens. I feel like we have tried everything and still our water is lime green. I hope this last treatment will produce a miracle. Any suggestions.......