The Planted Tank Forum - View Single Post - Cloudy glass / mineral buildup / vinegar doesn't work
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Old 02-02-2013, 12:58 AM   #6
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Without any pix and assuming it's actually calcium buildup and not organic, I would tape off the water as you described and then wet a paper towel with muriatic acid (Lowes - $9 a gallon) and it should clean up lickity-split. I dunno about Kaboom or erasers on that stuff. I do know that muriatic acid will eat it right up!
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