Rotten Egg Smelling Water and Rust Stains
Other minerals can be found in water besides manganese and calcium, especially if you have a well as your water source.
For example, ferrous iron is a common mineral and it creates nasty rust stains in sinks, tubs and toilets. Manganese causes black staining and is often found with iron.
“Rotten egg” smelling water is caused by hydrogen sulfide gas. All these problems and more can be filtered out of your water with special water treatment softening systems, but a standard water softener will not take care of these problems. You must have a water treatment system designed for eliminating these additional minerals.