What is in my water that turns the toilet bowl black not caused by mold
I am moving into an older home (George Washington may have actually slept there :-)). The water supply is from a well and has an existing water condition. There is a blackish residue inside the toilet bowl especially in the water lines where the bowl refills after flushing. I do not believe it is caused by mold. What might that be and what is the best water test kit available? The area close to the house is being farmed and I assume it is not organic farming. Thanks for your thoughts and comments.
Black spots in toilet bowl.
This may be a little late for the original asker, but it may help someone else. The black is probably coming from a deteriorating washer in the tank. To test this, turn off the water and flush the tank. It doesn't have to be completely dry. At the bottom of the tank are two large screws with a metal washer and a black fabric washer. Run your finger across the black washer. If it stains your finger, and/or the black color spreads to the water remaining in the tank, that's your problem. You've probably used one of these bleach tablets or other products in the tank, and they've rotted the washer. To fix, drain the tank completely and unscrew one screw at a time. The screws are attached on the bottom outside of the tank with a plastic washer and a nut. Take the black washer to the local hardware store and get replacements. Wash the tank completely and insert the large screw with the metal and black washer into the opening at the same time placing the plastic washer and the nut on the other side. Tighten the screw and nut making sure not to shake the tank too much. It must be square. Once you're confident the screw is tightly in place, repeat the process with the other screw. Make sure the washers go back exactly as you removed them, and NEVER PUT A BLEACH PRODUCT IN YOUR TANK AGAIN.