First time pool owner (18"x4' intex with SWG). I have researched enough to know that green hair is caused by copper. My copper test strips and the sample I took to a local pool shop all show the copper levels are fine. However, since my daughter and I have a lovely green tint to our hair every time we swim, I'm assuming those tests are not accurate. The book that came with my SWG says if copper level is high (which I assume it is) to drain 20% of the pool and refill. I did that but we are still getting green in our hair. The book also says that you can add aluminum sulfate to take care of the problem. I bought some but can't really find anything about this online so I'm afraid to add it to my pool. Does anyone know anything about adding aluminum sulfate? Will it really reduce the copper?