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aquarium außenfilter

Skip it

Soft demand (-32.4% this quarter) — this niche doesn't clear our bar today.

Market size 35Growth 9Conversion 17Competition 69Returns 36Price range 48Avg price 86Brand share 57Review moat 49Quality gap 84

Avg price

Great€68.90

avg listing price — sweet spot $15–$100

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Competition

Good44%

top-5 click share — leaders hold, buyers still browse

Brand share

Good71%

top-5 brand share — brands hold most of the demand

Review moat

Okay1,573.82

avg incumbent reviews — the moat a new listing must climb

Price range

Okay€12.08–€188.91

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

Returns

Okay4.2%

return rate — above 5% kills the launch gate

Market size

Okay€171K

€171K/yr · 182K searches

Conversion

Bad1.4%

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

Growth

Bad-32.4%

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

According to Flapen's Amazon Germany niche tracking, aquarium außenfilter is a €171K/yr Amazon Germany market (182K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in Jan–Feb. Verdict: Skip it — 45/100.

Data updated Jul 13, 2026 · scored weekly · How we score niches

aquarium außenfilter market data

Units sold / yr
2K–2K
avg 0–100/product
Revenue / yr
€103K–€138K
units × avg price
Conversion rate
1.4%
Avg BSR
#106
Page quality
0%
Prime
79%
Sponsored
82%
Out of stock
10.4%
Avg brand age
69 months
Avg seller age
185 days

Competition & brand share

The top 5 products take 44% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 rising

Sellers

60

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

44%

Top 20: 86%

Open market

23%

  • JBL28%
  • Eheim19%
  • Tetra10%
  • AquaOne7%
  • Fluval7%
  • SunSun6%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -32.4% search growth over the last 90 days.
5K3KPrime Day '24Spike '24Black Friday '24Spike '25Prime Day '25Black Friday '25SepDecMarJunAugNovMarMay

Peak months: Jan, Feb · busiest ÷ quietest = 1.9×

Top aquarium außenfilter search terms

  • aquarium außenfilter48K/yr
  • eheim außenfilter48K/yr
  • außenfilter aquarium24K/yr
  • aquarium aussenfilter17K/yr
  • aussenfilter für aquarium12K/yr
  • außenfilter8K/yr
  • aquarium filter außenfilter7K/yr
  • aquarium außenfilter mit heizung5K/yr
  • jbl außenfilter6K/yr
  • außenfilter aquarium 200l6K/yr
All search terms

Top aquarium außenfilter 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.

0%4%€7K8%€14K12%€20K16%€27K1101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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

What buyers say about aquarium außenfilter

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

What buyers love

Filterung40%

“Aquarium Filter”

Qualität insgesamt16%

“Top Produkte”

Preis-Leistungs-Verhältnis10%

“Super Filter für das Geld”

Einfache Reinigung6%

“Sehr Leise super leicht zu reinigen”

beworben Vs Tatsächliches Produkt4%

“Tut was er Tut”

Benutzerfreundlichkeit3%

“Top, leicht zu bedienen”

Gesamtgröße3%

“die Anschlüsse passen”

Wasserfluss2%

“Sehr gute Aquarium Pumpe”

Sprühen/Durchfluss2%

“Ein weiterer Pluspunkt ist die flexible Wasserzirkulation”

Stärke2%

“Super starke Leistung für so ein kleines Ding”

What buyers complain about

Filterung23%

“Am Ende leckt der Filter wie Wild”

Haltbarkeit15%

“Defekt nach 5 Monaten”

Qualität insgesamt8%

“Müll”

Auslaufsicher8%

“Undicht”

Gesamtgröße6%

“völlig unterdimensioniert”

Einfache Reinigung6%

“reinigung wird schwierig”

Stärke4%

“zu schwache Pumpe”

Wasserfluss4%

“Nach Wasserwechseln habe ich immer wieder das Problem, dass sich zu viel Luft im System befindet, was eine menge Geduld erfordert”

Heizung3%

“Bei meinem ersten ist nach kurzer Zeit der Motor überhitzt”

Montage/Installation2%

“Eine schöne sauber Installation ist einfach unmöglich”

Top return reasons

Gesamtgröße27%
Filterung26%
Defekt Material/Teile10%
Funktionalität insgesamt8%
Kompatibilität – insgesamt7%
Auslaufsicher4%
Produktzustand3%
Stärke2%
Haltbarkeit2%
Wasserbeständigkeit2%

Common questions

Is aquarium außenfilter profitable to sell on Amazon Germany?
The niche generates €171K/yr across 34 tracked products. 1 of 8 products launched in the last 360 days are still selling. 90-day search growth is -32.4%. Flapen's verdict: Skip it (45/100).
How competitive is the aquarium außenfilter niche?
16 brands and 60 sellers compete. The top 5 products take 44% of clicks and top 5 brands hold 71% of demand.
What do buyers complain about in aquarium außenfilter?
Top complaints mined from reviews: Filterung, Haltbarkeit, Qualität insgesamt. The return rate is 4.2%.
When does demand for aquarium außenfilter peak?
Demand peaks in Jan–Feb; the busiest month runs 1.9× the quietest.
What does it cost to enter the aquarium außenfilter niche?
Listings span €12.08–€188.91; the average listing price is €68.90 (sweet spot $15–$100). The average incumbent carries 1,574 reviews — the moat a new listing must climb.