How to Get Hard Water Stains Out of Your Toilet


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  • American Water Works Association. "How Water Works: Lime Softening Removes Hardness-Causing Minerals." AWWA.org. 2007. (May 26, 2012) http://www.awwa.org/files/Publications/Opflow/HowWaterWorks/OPF0707_Dept3HWW.pdf
  • Derringer, Jaime. "The Daily Fix: Remove Hard Water Stains." DIYLife.com. July 23, 2010. (May 26, 2012) http://www.diylife.com/2010/07/23/the-daily-fix-remove-hard-water-stains/
  • U.S. Dept. of the Interior, U.S. Geological Survey. "Water Hardness." USGS.gov. 2012. (May 26, 2012) http://water.usgs.gov/owq/hardness-alkalinity.html

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