Start with hard water basics
What hard water is, how soft water differs, and the first steps before you buy gear. We strip away the marketing jargon to give you real answers.
What is hard water?
Hard water is simply water with a high mineral content, primarily calcium and magnesium. It is not a medical emergency—but it is a silent cost driver at home.
Common signs
Scale, dry skin, dull laundry.
The numbers
Grains per gallon (gpg) or ppm.
What it damages
Heaters, pipes, fixtures.
Hard water vs soft water
Softening is not “cleaning” water—it is an ion exchange that swaps hardness minerals for sodium (or potassium).
- Soft water helps appliances last longer by cutting scale.
- Hard water needs more soap for the same lather.
- Soft water can feel “slippery” because minerals are swapped out.
The golden rule
Never buy a system before you know your hardness. A simple DIY kit is enough for a first decision—skip the sales pitch “free water test.”
Get a test kitRecommended reading
Best next guides after the basics
Start here if you already know what hard water is and want numbers, gear, or a fix path.
Suggested order
Fleck 5600SXT Settings: Programming Guide & Common Errors
Fleck 5600SXT programming guide: set hardness (gpg), day override, and regeneration time. Decode Err 1/2/3 codes and fix the settings people get wrong.
Hardness Test Kits and Strips: What to Buy
Strips vs drop-count titration vs digital TDS meters compared. How to sample cold tap water, convert ppm to gpg, and avoid a softener sizing mistake.
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How to Add Salt to Your Water Softener (Step by Step)
Step-by-step guide to adding salt to your water softener: when to refill, how much to add, how to break a salt bridge, and common mistakes to avoid.
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How to Choose a Water Softener (Size and Features)
Three steps: test hardness gpg, size by people x gallons x gpg x regen days, then pick metered regen, resin volume, and matching iron rating before buying.
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Water Softener Salt: Pellets, Crystals, How Often
Water softener salt types, how often to add salt, salt bridge and mush, and when resin cleaners help—an editorial overview, not a ranked top-10.
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Hard Water Stains on Glass (Remove and Prevent)
Hard water leaves mineral spots on glass when it dries. Remove with vinegar or descaler, prevent with squeegee and sealant, then test your hardness.
ReadReady to take the next step?
Jump by situation—test, numbers, gear, or something already wrong.
Start guides
What Is Hard Water? (Signs, gpg, and What It Damages)
Hard water means high levels of calcium and magnesium. Learn the signs, hardness units, and what to do next.
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Hard Water vs Soft Water: What Actually Changes
Hard vs soft water changes soap lather, glass spotting, laundry, and scale. Here's what actually differs and how people get soft water at home.
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