Quote Originally Posted by Lschaal
What do you mean about it still being in the pool and can return? I thought that once I put that stuff in there, that the filter picked it up or something. Does that mean I have to keep treating it? How do I get it out all together? I do not want GREEN Hair!! How did it get there in the first place? I did not think this was a common problem with an above ground pool.
Metal treatments are sequestering agents. They bind to the metal ions in the water and "deactivate" them so to speak. This effect will wear off after time. pH is a large factor in this. In theory, as the metals fall out of solution they will precipitate in your filter but in reality they usualy do it in the pool. Copper will cause blue or blue green staining. Sorry to say that copper(like herpes) is forever. Anyone who has ever kept salt water aquariums knows this since copper is deadly to salt water invertebrates and is used to treat fish only tanks. Using Aquariums or equipment for invertebrates that have previously used for fish only tanks can prove deadly for the animals even if they are thoroughly cleaned! I have over 30 years experience in SaltWater aquariums and have seen it happen time and again!

It just means that you will probably have to use a sequestering agent in you pool when the green color returns. Not that big a deal.
As to how it got there--if you used an algecide to kill the algae it might have been copper based.