There are many possible reasons for the appearance of mold in your toilet tank or bowl. If you've been gone for awhile, the stagnant water can breed the mildew, .
We had black mold in the toilets I used, not the rest of the family. I had not been. Once in a while I've noticed a fine line at the water line in bowl. Always .
Orange or pinkish slimy mold can develop around the toilet bowl at the spot where the top of the water sits in the bowl. Like black mold, orange mold is naturally .