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algenvernichter aquarium

Skip it

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Market size 32Growth 17Conversion 100Competition 12Returns 99Price range 0Avg price 22Brand share 0Review moat 24Quality gap 75

Conversion

Incredible19.4%

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

Returns

Incredible0.2%

return rate — above 5% kills the launch gate

Quality gap

Great4.3★

avg incumbent rating — lower means beatable quality

Market size

Okay€149K

€149K/yr · 97K searches

Review moat

Bad6,103.22

avg incumbent reviews — the moat a new listing must climb

Avg price

Bad€7.91

avg listing price — sweet spot $15–$100

Growth

Bad-16.6%

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

Competition

Bad86%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

Price range

Bad€4.49–€12.20

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

According to Flapen's Amazon Germany niche tracking, algenvernichter aquarium is a €149K/yr Amazon Germany market (97K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 39/100.

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

algenvernichter aquarium market data

Units sold / yr
13K–15K
avg 1,250–1,500/product
Revenue / yr
€99K–€119K
units × avg price
Conversion rate
19.4%
Avg BSR
#81
Page quality
0%
Prime
100%
Sponsored
56%
Out of stock
0.0%
Avg brand age
68 months
Avg seller age
184 days

Competition & brand share

The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.

Brands

5 falling

Sellers

32

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

86%

Top 20: 100%

Open market

0%

  • Tetra60%
  • ARKA27%
  • JBL7%
  • Easy Life4%
  • EASY LIFE2%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -16.6% search growth over the last 90 days.
4K3KSpike '24Spike '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Top algenvernichter aquarium search terms

  • algenvernichter aquarium27K/yr
  • aquarium algenvernichter13K/yr
  • algenmittel aquarium9K/yr
  • algumin7K/yr
  • aquarium algen entferner7K/yr
  • algenentferner aquarium5K/yr
  • algen aquarium entfernen6K/yr
  • algumin tetra 500ml4K/yr
  • anti algen aquarium5K/yr
  • tetra algumin4K/yr
All search terms

Top algenvernichter aquarium 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%10%€15K20%€30K30%€45K40%€60K1001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 9 tracked products in this niche — three views at once, no toggling.

What buyers say about algenvernichter aquarium

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

What buyers love

Qualität insgesamt31%

“Super Produkt”

Benutzerfreundlichkeit26%

“Handhabung”

beworben Vs Tatsächliches Produkt19%

“Erfüllt sein Zweck”

Preis-Leistungs-Verhältnis6%

“Top Preis -Leistungsverhältnis”

Gesamtgröße4%

“97/100 Mal passt es”

Wasserbeständigkeit4%

“Und das Wasser im Aquarium ist Algen frei”

Funktionalität insgesamt2%

“Gut inder Eirkung”

Sprühen/Durchfluss1%

“schrittweise Zugabe, somit bleibt das Wasser stabiler und die Wirkung effektiver als wenn man die gesamte Menge auf einmal reinkippt”

Zeitaufwand1%

“Hilft sehr schnell”

Stärke1%

“insgesamt stabiler seit der Anwendung.”

What buyers complain about

Funktionalität insgesamt46%

“Wirkt nicht”

Preis-Leistungs-Verhältnis9%

“Geldverschwendung”

Auslaufsicher7%

“Flasche ausgelaufen”

beworben Vs Tatsächliches Produkt7%

“Amazon Beschreibung ist falsch”

Farbe6%

“Pinselalgen werden grau”

Qualität insgesamt4%

“sehr schlechtes Produkt”

Haltbarkeit4%

“nach 4 - 5 Tage waren die Fadenalgen weg”

Anleitung/Benutzerhandbuch/Fehlerbehebung4%

“Bei exakter Befolgung der Anwendungsanweisung ein Erfolg von 0,00%”

Abgestanden/verfault/verwöhnt4%

“Algen sind noch da wie vorher”

Kontamination4%

“Vorsicht”

Top return reasons

Funktionalität insgesamt28%
Auslaufsicher21%
beworben Vs Tatsächliches Produkt18%
Kompatibilität – insgesamt8%
Gesamtgröße8%
Benutzerfreundlichkeit5%
Wasserbeständigkeit3%
Preis-Leistungs-Verhältnis3%
Feucht/Trocken3%
Zertifizierungen3%

Common questions

Is algenvernichter aquarium profitable to sell on Amazon Germany?
The niche generates €149K/yr across 9 tracked products. 90-day search growth is -16.6%. Flapen's verdict: Skip it (39/100).
How competitive is the algenvernichter aquarium niche?
5 brands and 32 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 100% of demand.
What do buyers complain about in algenvernichter aquarium?
Top complaints mined from reviews: Funktionalität insgesamt, Preis-Leistungs-Verhältnis, Auslaufsicher. The return rate is 0.2%.
When does demand for algenvernichter aquarium peak?
Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the algenvernichter aquarium niche?
Listings span €4.49–€12.20; the average listing price is €7.91 (sweet spot $15–$100). The average incumbent carries 6,103 reviews — the moat a new listing must climb.