THE PROBLEM
What hard water does to you – every day
Have you ever noticed that water in Germany is much harder than in many other countries? Especially in cities like Munich or Cologne, this quickly becomes noticeable through limescale deposits in the shower – but also, less obviously, in your hair and on your skin.
Brittle, dull hair
Limescale and chlorine build up on the hair structure, weighing down the hair and robbing it of shine and bounce. Hair care products are of little help – the problem lies in the water.
Dry, irritated skin
Chlorine attacks the skin's natural protective barrier. The result: dryness, tightness, and for sensitive skin, often redness or itching after showering.
Limescale everywhere
On glass showers, fixtures, and tiles, limescale appears as a white, cloudy film. Hard to remove, quick to return – an endless battle.
Clogged nozzles & loss of pressure
Limescale builds up in the showerhead nozzles, noticeably reducing water pressure over time. The showerhead clogs – the showering experience deteriorates.
UNTERSCHIEDE
Water hardness comparison
Water hardness measures how many dissolved minerals – primarily calcium and magnesium – are contained in tap water. In Germany, it's stated in degrees of German hardness (°dH); the international unit is mg/L (milligrams per litre, equivalent to ppm). The conversion: 1 °dH = 17.8 mg/L.
Classification by German standard:
- Soft: below 8.4 °dH (under 150 mg/L)
- Medium: 8.4–14 °dH (150–250 mg/L)
- Hard: above 14 °dH (over 250 mg/L)
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Sources
- wassertipps.de (database with over 75,000 measurements for 28 European countries, as of 2024)
- ZeroWater Europe – Limescale in Tap Water (2025)
- naturalanswerproducts.com – Water Hardness Guide by Country (2026)
- limpea-store.com – Hard Water in Europe (2025)
Values are averages – actual hardness varies considerably depending on city, district and water supplier. You can find the exact value for your address free of charge at wasserhaerte.net.
THE SOLUTION
A shower head that solves the problem at the root
Instead of installing expensive water softening systems or continuously buying care products, there's a simpler way: filtering out lime and chlorine directly while showering. (Visit the shop)
Soft water – instantly
The integrated 7-stage lime filter reduces lime, chlorine, and heavy metals directly as the water flows through – no installation, no professional needed.
Assembly in 2 minutes
Fits all standard shower hoses. No tools, no modifications. Just screw it in – done.
9 spray modes
From a gentle spray to a powerful massage jet – for a luxurious shower experience that simultaneously delivers filtered water.
Swap filter in 30 seconds
Replace the filter every 2–3 months – simply unscrew the old one and insert the new one. Replacement filters are available in a convenient 2-pack for €19.90.
TECHNOLOGY
The multi-stage filter system
Each stage has a specific task. Together, they remove what makes hard water problematic.
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Maifan Stone
Binds heavy metals like lead & arsenic, releases valuable minerals.
Calcium sulfite
Converts chlorine into harmless chloride ions in a flash.
VC Ball
Vitamin C balls gently neutralise residual chlorine.
KDF Ball
Copper-zinc granules precisely bind heavy metals.
Magnetic spheres
Water molecule clusters break up – increases bioavailability.
Negative ions
Ceramic balls increase the dissolved oxygen content in the water.
Carbon Beads
Activated carbon absorbs odors, flavors & organic compounds.
Aia Pure
Shower Head with filter
FREQUENTLY ASKED QUESTIONS
Questions about hard water & the Aia Pure filter
How do I know if I have hard water?
The simplest signs: limescale spots on glass panes, fittings or kettles, soap that lathers poorly, or hair that feels dull and heavy after washing. You can find out the exact hardness value from your local water supplier or via corresponding online maps for Germany.
Is the Aia Pure shower head an alternative to a water softener system?
For shower water, yes – and at a fraction of the cost. Water softening systems cost several hundred to thousands of euros and must be installed by specialists. The Aia Pure shower head filters limescale, chlorine, and heavy metals directly at the shower head, without modification, for €39.90.
How often does the filter need to be changed?
We recommend changing it every 2–3 months, depending on the lime content of your water and how many people shower in your household. In regions with very hard water, it's better to change every 2 months; with medium water hardness, 3 months is sufficient. Replacement filters are available in a convenient pack of 2 for €19.90.
Does the filter reduce the water pressure?
No – on the contrary. Thanks to the precision nozzles of the Aia Pure showerhead, the spray is often perceived as more powerful than with conventional showerheads, even with low line pressure.
Which hoses does the shower head fit?
The Aia Pure shower head fits all commercially available standard shower hoses (G1/2" thread), which are installed in almost all households in Germany. Installation without tools is possible in about 2 minutes.