Re: Bright blue to light purple water

Originally Posted by
aylad
I believe that magnesium in the water is generally what causes the purple color, although it's been awhile since anyone here had a problem with it. Do some searching through the forum on Magnesium, and I'll see if I can find the posts from the archives about it....and hopefully in the meantime one of the chemistry experts will stop by and advise you.
Janet
Janet, it's not magnesium (that's a normal part of water hardness along with calcium) buit manganese that colors the water pink to purple!
Retired pool store and commercial pool maintenance guy.
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