Tannins can impart a yellow hue to water and may leave yellow stains on fabrics washed in tannin-laden water. Particularly where running water from protracted leaks or drips has been present tannins can produce a yellow stain on the porcelain surface of a sink toilet, or tub or on other chi...
When they "give up the ghost" (for other problems) both stainless steel and porcelain tubs are as clean as the day I bought them. It not only keeps the tub clear of hard water buildup it keeps the sprayer holes clear also. I must mention, we have always lived in a hard water area...
Note: Not recommended for older, worn or chipped porcelain cast iron fixtures. Toilet Bowl & Water Tank Rust Stain Removal Remove cleaners or deodorant from bowl or tank. Flush. Bowl Add 1/2 cup to water in bowl. Scrub stained area with brush. Let stand until stains are gone. Flush. ...