What Causes Black Ring in Toilet?

Answer

Black rings around the inside of a toilet are generally caused by two things: hard water, mold, and urine. The black ring should be first sprayed with bleach water to kill bacteria. Flush the toilet, then proceed to scrub the black ring away using a toilet brush and toilet bowl cleaner.
Q&A Related to "What Causes Black Ring in Toilet?"
Hard water deposits will accumulate on any surface that regularly comes into contact with your house's water supply, including shower heads, faucet spouts and your toilet's bowl.
http://www.ehow.com/info_8720500_causes-black-ring...
Black rings around the water in your toilet, if not a sign of cleaning neglect, can mean hard water in your septic system. Hard water buildup can leave stains that may need a heavy
http://wiki.answers.com/Q/What_causes_a_black_ring...
my blood sugar levels are very high and right after I urinate it gets the black ring from the high sugar level in my urine. you need to see a doctor and be tested. normal blood sugar
http://answers.yahoo.com/question/index?qid=200610...
Black Mold, also known as Stachybotrys Chartarum (atra) is a greenish-black
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