Total hardness and calcium hardness in pool water.
Scale, calcium buildup, hard water and scaling problems.
Pool Newbie
Pool Newbie
Posts: 1
Joined: Sat 22 Aug, 2009 10:52


Postby gracielu » Sat 22 Aug, 2009 10:58

I have a scum that is building in the skimmers and now in the chlorinator. It starts as a tan color of putty consistency then turns black. Can anyone tell me what this is?

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