i'm sure it's unnatural for a toilet to flush pink. especially when i put one of those stinky blue cubes into the tank so that it would flush blue. what is it, rust in the pipes? that would flush red wouldn't it? and anyway it sometimes does flush blue too. i've looked in the tank many times and the water remains blue as ever, and i see nothing pink. so why does it sometimes flush pink? does something in the chemical react with air? what? cindy?