If you live in a hard-water part of the UK, you have probably watched chalky white marks creep across your shower glass, taps and tiles. So it is a fair question to ask before you buy a shower filter: do shower filters actually remove limescale?

The honest answer is nuanced, and worth understanding before you spend money. Here is what a shower filter does, what it does not do, and how to genuinely cut down limescale in your bathroom.

What limescale actually is

Limescale is the hard, chalky deposit left behind when hard water evaporates. It is made mostly of dissolved calcium and magnesium, the same minerals that make water "hard". Over 60% of the UK has hard water, which is why so many homes battle scale on shower screens, kettles and taps.

Because those minerals are dissolved in the water, the only way to remove them completely is to change the water's chemistry, which is what a water softener does.

So, do shower filters remove limescale?

A shower filter will not soften your water or strip out all the dissolved minerals that cause limescale. No standard shower filter does. If a product promises to "remove all limescale", treat that claim with caution.

What a good multi-stage filter does do is reduce the contaminants that make hard water harsh on your skin and hair, and help reduce visible scale build-up over time by filtering sediment and some of the particles that scale clings to.

What a shower filter genuinely does

A quality filter like the Clossyo shower filter uses KDF-55 and activated carbon media to:

• Reduce chlorine by up to 99%, the main culprit behind that dry, tight feeling after a shower
• Reduce chloramines, heavy metals such as lead and mercury, sediment and bacteria
• Help reduce limescale build-up on your shower screen and fittings
• Leave your skin feeling softer and your hair less dry, brittle and frizzy

In other words, the biggest wins are for your skin and hair. Filtering out chlorine and metals is exactly what helps people with eczema, sensitive skin and dull, hard-water hair, and it is where you will notice the difference fastest.

Shower filter vs water softener: which do you need?

These solve different problems, and many homes use both.

• A water softener is a whole-home system that removes the dissolved calcium and magnesium. It is the only thing that truly stops limescale forming, but it is a plumbed-in, higher-cost install.
• A shower filter is a five-minute, screw-on upgrade that targets the water you actually shower in. It is aimed at your skin and hair, and it reduces the build-up and harshness you feel every day, without any plumbing.

If your priority is softer skin, calmer irritation and healthier hair, and you want it sorted this week, a shower filter is the practical choice.

How to reduce limescale in your shower

1. Fit a multi-stage shower filter to cut chlorine and reduce build-up on your fittings
2. Squeegee your shower glass after each use so minerals cannot dry and set
3. Wipe taps and screens weekly with a gentle descaler or diluted white vinegar
4. Replace your filter cartridge on schedule so it keeps performing (the Clossyo filter lasts around 3 months, or 15,000 litres)

The bottom line

A shower filter is not a limescale eraser, and any brand that says otherwise is overpromising. What it is, is the easiest, most affordable way to make hard water gentler on your skin and hair from your very first shower, while helping keep scale build-up down. For most people in hard-water areas, that is exactly the upgrade they are looking for.

Want softer skin and hair without the plumbing? Explore the Clossyo Original shower filter or the Lavender Scented filter, both with a 30-day money-back guarantee and free UK delivery over £35.