Black something in toilet bowl.

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I have a toilet bowl that grows some kind of black funk in and around the bowl. I need help figuring out what this is and how to get rid of it. I clean my bathroom once a week with clorox and now the black has stained the bowl. This is our guest bathroom and It's just my husband and I here.
  19 answers
  • Robin Rodriguez Robin Rodriguez on Nov 27, 2013
    sounds like hard water and bleach makes mine worse...sno bowl works great
  • Laila Garrett Laila Garrett on Nov 27, 2013
    how old is the toilet? is it in a ring at the water line? If so it may be the tank that needs to have new fittings or try to clean the tank first. Try adding baking soda and vinegar to the bowl. Turn off the water to the tank, flush and in the little water left add a 8 oz box of baking soda and a cup of vinegar, while it's foaming take your brush and scrub. You can make a paste of the baking soda and vinegar and use it in spots as well. I use it in a paste for mold in the corner of my shower once a month.
  • Sandra Campbell Sandra Campbell on Nov 27, 2013
    Vinegar, Seems to clean everything. Try some in the tank and in the bowl. Let it sit, soak and flush. Should work.
  • Pamela Thurlow Pamela Thurlow on Nov 27, 2013
    I used the bleach tablets in the tank after bleaching everything in and out. It does seem to work. Periodically I still add bleach, but it stays pretty clean.
  • Lesa D Lesa D on Nov 29, 2013
    vinegar and baking soda http://www.ehow.com/how_8198266_kill-black-mold-toilets.html
    • Bonnie Lewenza Bonnie Lewenza on Apr 30, 2014
      @Lesa D You can use the vinegar and baking soda to scrub the toilet and it will disinfect it to. After you have it clean put some vinegar and tea tree oil in your tank.
  • Paul Bove Ceramic Tile Paul Bove Ceramic Tile on Nov 29, 2013
    Not sure if this will help but I'm a tile contractor and over the years I've taken about a zillion toilets out and put them back. Although rare I've seen roots come up from the drain pipe a few times. Might have to take the toilet off and check that out. If that's the case then some root killer might work.
  • Sharon Sharon on Nov 29, 2013
    Thank you my husband is going to try and take out the toilet this weekend and try to figure out whats going on.
  • Janis Lauer Janis Lauer on Nov 29, 2013
    I read somewhere that if you dump a liter of coke cola in the bowl and let it stay over night, the bowl will come out sparkling clean. I've never tried it so I can't attest to it's success, but it is worth a try.
  • Sharon Sharon on Nov 29, 2013
    I have resolved my problem.
  • Sharon Sharon on Nov 29, 2013
    Well my husband is going to be taking the bowl up this weekend to see whats going on. Also while it's out I will be bleaching the bowl replacing the wax ring and if that doesn't work we will have to replace the toilet. UGH!
  • Debbie Harris Debbie Harris on Nov 29, 2013
    The problem is in the water. I have had a brand new house with no trees or roots growing around and no one using the restroom, and still had this problem. Your local water company will come test your water for contaminants. In the mean time I used the blue tank discs like Tidy Bowl and it helps but you'll have to stay on it until they give you the results. Hate for you to go to the trouble of taking up your bowl before you have your water tested.
  • Sharon Sharon on Nov 30, 2013
    Thanks I didn't know that our water company would do that. My husband isn't excited about taking the tank out today!! I will tell him about this and maybe we will try that come monday morning instead. Thanks so much!
    • HelenVivian HelenVivian on Oct 19, 2020

      Did you get the water tested? Was that what was causing it? I have the same problem, a black substance forms at water line again and again after cleaning.

  • Beverly Beverly on Dec 06, 2013
    Try using a pumice stone to "erase" the black stains. They are usually available in the cleaning section of WalMart or any home improvement store and are very inexpensive. We used them when cleaning homes professionally. The grit is simply flushed down the toilet when you are finished using it. A stone will last for several months.
  • Marilynn Gillespie Marilynn Gillespie on May 02, 2015
    Barkeeper's Friend
  • Jo F. Jo F. on Sep 07, 2015
    I'm in OK too and the water in my town is very hard. Plus the water level in the bowl seems to be too low. I've had to use the pumice stone several times to get the ring out but in the bottom hole where the water goes down,it's very hard to get that out and I can't seem to do it. i haven't tried the coke yet but going too.
  • Marilynn Gillespie Marilynn Gillespie on Sep 07, 2015
    Barkeeper's Friend works like a charm. Just sprinkle it on and wash it off with a toilet brush!
  • Debbie Lamont Debbie Lamont on Oct 18, 2015
    Break up a pool puck and put a few small pieces in the tank. Keeps the bowl sparkling . Warning , don't use too much
  • Jim Saurman Jim Saurman on Nov 01, 2015
    It's just mildew. It's due to the extremely high humidity in the room from the shower. Spray the bowl down with a bleach based bathroom cleaner every few days, only takes a second or two.
  • Esmeralda Paredes Esmeralda Paredes on Nov 02, 2015
    you can make this put 1 cup of baking soda and 1 cup of vinegar overnight and in the morning flush it the mixture will make some effervescence do not worry you have to make it several time if the black funk it is some old but this work very well and it is friendly environment
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