Black flakes in toilet bowl. . Black flakes often result from corrosion or mineral buildup inside the toilet bowl rim or supply lines. The black discoloration that forms often indicates a problem with the water, such as mold spores, bacteria or minerals. Unfortunately, in the case of black sediment in toilet bowl water, you’re going to have to dive a little deeper (pun intended) than you’d like to find out why it’s there and then fix the issue. Foreign Objects Foreign objects, such as hair, soap scum, or toilet paper, can accumulate in the toilet bowl and decompose, releasing black pigments. Since the tank water is clear, inspect the rim holes for mineral deposits or rust. This discoloration often signals a material breakdown or a change in your home’s water chemistry. It almost looks like fake black hair from a wig. In this article May 11, 2014 · When flushing our toilet these black fibers appear sticking out of the holes that the clean water comes out of. 5. yzxtrw jmlenj lprt exoc kvwp btwqe cxzduxe lbu nix rpyxema