I moved to a city with famously hard water. Within three weeks my hair felt like straw. My skin was dry and itchy. I tried expensive shampoo, expensive conditioner, expensive body wash. None of it helped because the problem was not what I put on my body — it was what the water was leaving on my body.

A shower filter cost me $35. Two weeks later my hair was soft again. Here is what I learned after researching way too many options.

What Shower Filters Actually Remove

Most shower filters target chlorine and chloramines — the chemicals water treatment plants use to disinfect. These strip natural oils from your skin and hair. Some filters also reduce sediment, rust, and heavy metals like lead and mercury.

Important note: shower filters do not soften water. They do not remove dissolved calcium and magnesium — those require a whole-house water softener that costs hundreds or thousands of dollars. A shower filter improves the water, but it will not turn hard water into soft water.

Which Type to Choose

Inline filters screw between your existing shower arm and shower head. These are the most common, the easiest to install, and the cheapest. No tools needed — unscrew the shower head, screw on the filter, screw the shower head onto the filter. Takes 5 minutes.

Filtered shower heads replace your entire shower head with one that has a built-in filter. These cost more but often have nicer spray patterns and are easier if your shower head is old anyway.

What I Noticed

The difference was not dramatic on day one. By the end of the first week, my skin felt less tight after showering. By the end of the second week, my hair stopped feeling like hay. The effect is subtle and cumulative — you might not notice it happening, but you will notice if you go back.

I stayed at a hotel for a weekend without a filter and remembered immediately why I bought one.

Replacement Schedule

Filters last about 6 months or 10,000 to 12,000 gallons. I write the install date on the filter housing with a Sharpie so I remember when to replace it. If your water pressure drops noticeably before 6 months, the filter might be clogged with sediment — replace it early.

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