We have a 27ft round ABG pool. We have a salt water cell. My water used to be blue but cloudy, now it is green and hazy. I took a water sample to the pool store and they said to add acid, shock with 2bls, super blue, phosphate remover and metal out. They said I had high levels of copper. I got the ph to 7.6. I shocked with the 2lbs of di-chlor and chlorine is 3.0. Normally after I shock the pool it will turn the water blue, but it is still green as ever. I added the phophate remover like they said. I just have a feeling that this isn't going to work. I think I should have used more shock. My salt was 4100. Any help would be greatly appreciated! It tested free of algae. I am so confused. I am backwashing every 12 hours.