How accurate is the pool store's metal test? I took a sample in just to test, to see if there are metals present. They said no metals. I just added some bleach 30 minutes ago and the water didn't turn green again. It took until mid day today for it to turn back blue from when it turned green yesterday evening when i added the great value bleach. Only difference between yesterday and today is, i added some baking soda and used name brand bleach(Clorox).