Home water · DIY guides
Understand hard water. Choose the right system.
For homeowners who want specs and decision trees—not a sales appointment. Not pool care. Not “near me” installers.
Something’s wrong with my water
Spots, scale, or a softener that isn’t working.
I need to understand or choose gear
Hardness numbers, softener size, salt, filters vs RO.
Test before you buy
Hardness (gpg) first—guessing grain capacity wastes money.
Systems that match the job
Softener ≠ whole-house filter ≠ under-sink RO.
Honest limits
Salt-free usually won’t zero hardness grains. No fake “lab tested 11 units.”
Water looks wrong—or the softener does
Clean the symptom if you need to—then fix the cause.
A simple path
Test → understand → choose → maintain.
Size the softener before you shop
People × water use × hardness beats square-footage guesses.
Softener, filter, or RO?
Different jobs. Don’t buy one hoping it does all three.
Gear by role—not a trophy brand list
How to choose a softener
Size by people, use, and hardness—not square footage. Features that matter without a fake top-ten list.
Read guideTest kits that work
Strips vs drop kits vs digital. Know gpg before you buy a system.
View recommendationsSalt selection
Pellets, crystals, or potassium? How often to add salt—and salt-bridge risk.
See salt guideMore how-tos: Pellets vs crystals How to add salt Fleck 5600SXT settings