First flush the toilet and pour a cup of bleach into the bowl when the water begins to return.
Mildew in toilet bowl.
Stir the bleach around in the water with the toilet bowl brush.
Wait about an hour then scrub with a toilet brush and flush.
Do not scrub your toilets with a metal or steel wool pad.
Try adding a cup of white distilled vinegar to the tank and a cup of vinegar to the toilet bowl.
Commercial toilet bowl cleaners contain disinfectants that can handle any mildew that can establish itself in the toilet.
The rust like stains at the bottom of the toilet bowl are almost certainly caused by mineral deposits said rachelle fidler a consumer adviser for american standard toilets and faucets.
The water in your toilet tank should be clear and free of debris or contaminants.
Use anti fungal sprays on a regular basis.
Use the brush to scrub away the existing black water line on the bowl as well as on the underside of the rim.
This ring can also be from green mold or grey mold.
A toilet tank can provide the moisture mold needs to grow.
The best way to deal with mold in the toilet is to prevent it.
Orange or pinkish slimy mold can develop around the toilet bowl at the spot where the top of the water sits in the bowl.
Clean your bathroom including the toilet regularly once a week is a good cleaning schedule.
To clean under the rim simply squirt the cleaner around the top of the bowl and use a toilet brush to scrub.
Black molds thrive in areas that have a higher exposure to sugar.
If you see black mold growth in your toilet you ll need to take steps to remove the mold and prevent it from returning.
You can put borate borax in the toilet to help prevent the growth of mildew and mold.
Basically mold in the toilet bowl gets more energy when there is high glucose content in the urine and this is majorly in the case of diabetic individuals.
Continue scrubbing re dipping the brush in the bleach water when needed until it is gone.
Next using a scrubber begin to scrub around the toilet bowl and edges of the seat.
Black toilet mold is the most common color that forms a ring in your toilet.
Allow for that to settle in the bowl for 30 minutes or so.
In other words it is a good source of energy for the fungus residing inside the toilet bowl.