Is kalkfilter profitable to sell on Amazon Germany?

The niche generates €150K/yr across 55 tracked products. 7 of 11 products launched in the last 360 days are still selling. 90-day search growth is -15.5%. Flapen's verdict: Worth a look (52/100).

How competitive is the kalkfilter niche?

28 brands and 113 sellers compete. The top 5 products take 33% of clicks and top 5 brands hold 58% of demand.

What do buyers complain about in kalkfilter?

Top complaints mined from reviews: Filterung, Qualität insgesamt, Materialqualität. The return rate is 1.4%.

When does demand for kalkfilter peak?

Demand peaks in Jul–Aug–Sep–Oct; the busiest month runs 26.8× the quietest.

What does it cost to enter the kalkfilter niche?

Listings span €9.83–€498.83; the average listing price is €71.84 (sweet spot $15–$100). The average incumbent carries 3,296 reviews — the moat a new listing must climb.

kalkfilter

Worth a look

Shows low returns (1.4%), but soft demand (-15.5% this quarter) keeps it on the watch list.

Returns

Great1.4%

return rate — above 5% kills the launch gate

Avg price

Great€71.84

avg listing price — sweet spot $15–$100

Competition

Great33%

top-5 click share — an open shelf

Brand share

Great58%

top-5 brand share — no brand owns this niche

Quality gap

Good4.3★

avg incumbent rating — lower means beatable quality

Market size

Okay€150K

€150K/yr · 107K searches

Review moat

Okay3,296.49

avg incumbent reviews — the moat a new listing must climb

Conversion

Bad2.0%

search→purchase rate — share of searches ending in a sale

Growth

Bad-15.5%

90-day search growth — must beat 0% to launch

Price range

Bad€9.83–€498.83

cheapest to priciest tracked listing — scored on the share inside $15–$100

Signals No Dominant Brand High Price

According to Flapen's Amazon Germany niche tracking, kalkfilter is a €150K/yr Amazon Germany market (107K searches/yr). The top 5 brands hold 58% of demand. Demand peaks in Jul–Aug–Sep–Oct. Verdict: Worth a look — 52/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

kalkfilter market data

Units sold / yr: 2K–2K; avg 0–100/product
Revenue / yr: €108K–€144K; units × avg price
Conversion rate: 2.0%
Avg BSR: #70
Page quality: 0%
Prime: 89%
Sponsored: 87%
Out of stock: 6.7%
Avg brand age: 46 months
Avg seller age: 190 days

Competition & brand share

Clicks spread well past the top 5 (33% combined) — an open shelf where new products get seen.

Brands

28 rising

Sellers

113

Top-5 brand share

58%

Top 20: 96%

Top-5 click share

33%

Top 20: 74%

Open market

34%

BRITA15%
PHILIPS15%
Waterdrop12%
HappyFilter9%
Amazon Basics8%
Sydros8%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -15.5% search growth over the last 90 days.

Peak months: Jul, Aug, Sep, Oct · busiest ÷ quietest = 26.8×

Open Trend

Top kalkfilter search terms

kalkfilter46K/yr -21.4%1.6% conv.
wasserfilter kalk14K/yr -11.6%2.1% conv.
wasserfilter gegen kalk11K/yr -3.3%1.4% conv.
kalkfilter wasserleitung11K/yr -6.2%0.7% conv.
wasserentkalker für wasserleitung10K/yr -16.6%0.2% conv.
kalk wasserfilter7K/yr -14.2%1.8% conv.
kalk filter4K/yr -12.3%2.1% conv.
wasser kalkfilter4K/yr -17.7%1.4% conv.

All search terms

Top kalkfilter products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Amazon Basics Wasserfilter 2 3 Liter - Schwarz

Amazon Basics€14.074.4★16,874 rev

BRITA Wasserfilter Kanne Marella graphit (2 4l) inkl. 3x MAXTRA PRO Pure Performance Kartusche Kühlschrankgeeignete Filterkanne mit BRITA Memo Klapp-Deckel filtert Verunreinigungen

BRITA€23.984.7★11,634 rev

Waterdrop 10UA Untertisch Wasserfiltersystem Direkter Verbinden mit Küchenhahn 30.000 Liter Hohe Chlor-Reduktionskapazität USA Tech

Waterdrop€48.144.4★22,221 rev

HappyFilter€93.114.1★580 rev

Philips Water Inline-Duschfilter mit 1 Ersatzkartusche 50.000 L Kapazität reduziert Chlor um bis zu 99% passend für alle Standardschläuche und -armaturen Chrom

PHILIPS€22.084.2★11,497 rev

Newest

by launch date

HOMELODY Wasserfilter Trinkwasser für Küche entfernt Chlor Schwermetalle & Kalk verbessert den Geschmack 12x Adapter Blaulicht & 1 Filter enthalten Wasserfilter Wasserhahn 3.0 mit LED-Anzeige

HOMELODY€33.7027 rev

2mo ago

Measury Kalkfilter Untertisch - Wasserentkalker & Wasserfilter Kalk für Wasserleitung Wasserhahn & Küche - Trinkwasserfilter gegen Chlor Sand Rost - 8 L/Min kein 2. Wasserhahn Mineralien bleiben

Measury€52.248 rev

5mo ago

CISSIYOG Salzfreier Wasserentkalker für das Ganze Haus 1/2 Zoll Anschluss Wasserenthärter Kalkablagerungen in Wasserleitungen Toiletten und Wasserhähnen verhindern - DN15

CISSIYOG€37.234 rev

6mo ago

Frizzlife SK99 Untertisch Wasserfiltersystem 3-stufiger 0 5 Mikron Filter gegen Chlor & Blei NSF/ANSI 42&53 zertifiziert Anti-Kalk-Technologie verlängert die Filterlebensdauer

FRIZZLIFE€105.14320 rev

8mo ago

SYDROS Kalkschutzfilter Dusche Zoll aus Edelstahl reduziert Kalkablagerungen bis zu 90 Prozent ohne Salz oder Chemie für Dusche Badezimmer wartungsfrei einfach montierbar

Sydros€66.2271 rev

1y ago

What buyers say about kalkfilter

What buyers praise and complain about, mined from review topics.

What buyers love

Filterung29%

“Happy filter”

Qualität insgesamt16%

“Super Produkt”

beworben Vs Tatsächliches Produkt7%

“Alles bestens,genau wie beschrieben”

Preis-Leistungs-Verhältnis7%

“Beste Investition”

Benutzerfreundlichkeit6%

“Super einfache Handhabung”

Montage/Installation4%

“Installation einfach”

Design insgesamt3%

“Das Design ist modern”

Gesamtgröße3%

“Passt”

Einfache Reinigung3%

“Filtert sauber”

Materialqualität2%

“Material super Robust”

What buyers complain about

Filterung20%

“Filtert nicht”

Qualität insgesamt6%

“Qualität ungenügend”

Materialqualität5%

“Das Material fühlt sich dünn an”

Preis-Leistungs-Verhältnis5%

“Allerdings teuer”

Auslaufsicher4%

“it was dripping water when i opened the container”

Gesamtgröße4%

“Ausguss könnte etwas größer sein”

Haltbarkeit4%

“Keine lange Haltbarkeit”

Funktionalität insgesamt4%

“No function at all”

beworben Vs Tatsächliches Produkt3%

“Hält nicht mal annähernd was es verspricht”

Wasserbeständigkeit3%

“Nach kurzer Nutzung tropft Wasser an der Seite heraus”

Top return reasons

Gesamtgröße36%

Filterung14%

Kompatibilität – insgesamt9%

Defekt Material/Teile7%

Funktionalität insgesamt4%

Auslaufsicher3%

Materialqualität3%

Produktzustand2%

Qualität insgesamt2%

beworben Vs Tatsächliches Produkt2%

Common questions

Is kalkfilter profitable to sell on Amazon Germany?: The niche generates €150K/yr across 55 tracked products. 7 of 11 products launched in the last 360 days are still selling. 90-day search growth is -15.5%. Flapen's verdict: Worth a look (52/100).
How competitive is the kalkfilter niche?: 28 brands and 113 sellers compete. The top 5 products take 33% of clicks and top 5 brands hold 58% of demand.
What do buyers complain about in kalkfilter?: Top complaints mined from reviews: Filterung, Qualität insgesamt, Materialqualität. The return rate is 1.4%.
When does demand for kalkfilter peak?: Demand peaks in Jul–Aug–Sep–Oct; the busiest month runs 26.8× the quietest.
What does it cost to enter the kalkfilter niche?: Listings span €9.83–€498.83; the average listing price is €71.84 (sweet spot $15–$100). The average incumbent carries 3,296 reviews — the moat a new listing must climb.