Why the Well
White crust on the shower is hardness, not sulfur, and a sulfur filter will not fix it.
Spots on glasses. Soap that will not lather. A film on the coffee pot. That is minerals, usually calcium and magnesium.
Hard water is boring and extremely common in private wells. It is not a smell. It is scale.
Do this first
- Run a finger on the shower glass. Chalky white film that scrapes off is classic hardness.
- Does soap lather, or does it just sit there like paste?
- Is there a rotten-egg smell? If yes, that is a second problem. Do not buy one machine and hope it does both unless the test says the machine actually does both.
What it probably is
Dissolved calcium and magnesium. Water heaters, dishwashers, and fixtures grow a crust. Skin and hair feel coated. A water softener (ion exchange, salt) is the tool people have used for this for decades. Salt-free “conditioners” are a different claim. Do not treat a conditioner ad as a hardness test.
Get a hardness number (grains or mg/L as CaCO3) plus iron and pH. Iron in the same water can foul a softener. That is why the orange-stain page exists.
What not to buy
- An iron or sulfur filter as your only move because the internet said “well water system.”
- A tiny under-sink filter to save the water heater. Hardness is a whole-house mineral load.
- More vinegar forever as a strategy. Vinegar cleans the glass. It does not change the well.
If you already have a softener and the crust came back, the unit may be out of salt, bypassed, or undersized. Check salt and the bypass valve before you shop a new tank.
If you actually need a box
Get a hardness number plus iron and pH. The Watersafe well water test kit is enough to stop you from buying a sulfur filter for spots on glass. A softener still follows the number, not the ad.