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59

aquarium filter

Worth a look

Shows a sweet-spot price point ($25.59 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 59Growth 15Conversion 33Competition 78Returns 53Price range 85Avg price 95Brand share 83Review moat 45Quality gap 84

Avg price

Incredible€25.59

avg listing price — sweet spot $15–$100

Price range

Great€4.16–€91.50

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

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Brand share

Great52%

top-5 brand share — no brand owns this niche

Competition

Great37%

top-5 click share — an open shelf

Market size

Good€478K

€478K/yr · 706K searches

Returns

Good2.9%

return rate — above 6% kills the launch gate

Review moat

Okay1,960.24

avg incumbent reviews — the moat a new listing must climb

Conversion

Okay2.6%

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

Growth

Bad-19.2%

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

Competition

Clicks spread well past the top 5 (37% combined) — an open shelf where new products get seen.

Brands

22 falling

Sellers

76

Top-5 brand share

52%

Open market

43%

  • Tetra17%
  • JBL11%
  • OsAtNb9%
  • NICREW8%
  • COKDEZ7%
  • fishkeeper5%

Product shelf

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

0%3%€14K6%€29K9%€43K12%€57K101001K10K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 45 tracked products in this niche — three views at once, no toggling.

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -19.2% search growth over the last 90 days.
20K15KPrime Day '24Spike '24Spike '25Black Friday '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

Reviews

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

What buyers love

Filterung27%

“Aquarium Filter”

Qualität insgesamt11%

“Super Produkt”

Preis-Leistungs-Verhältnis10%

“VERY NICE FÜR DEN PREIS”

beworben Vs Tatsächliches Produkt9%

“Alles Bestens wie beschrieben”

Gesamtgröße5%

“Passt”

Wasserfluss4%

“Super Pumpe für kleine Aquarien”

Einfache Reinigung3%

“leicht zu reinigen”

Geräuschpegel3%

“super leise”

Stärke3%

“Stabile Ausführung, gute Bedienungsanleitung, leicht zugänglich zur Reinigung”

Druck3%

“Super kleine Pumpe”

What buyers complain about

Haltbarkeit26%

“Nach 2 Minuten defekt”

Filterung16%

“Der Filter ist leider Müll”

Qualität insgesamt9%

“Müll”

Gesamtgröße6%

“Dürfte etwas größer sein”

Geräuschpegel4%

“brummt recht laut”

Einfache Reinigung3%

“muss oft gereinigtr werden”

Stärke3%

“Hält nicht gut zusammen”

Funktionalität insgesamt2%

“Funktioniert nicht”

Preis-Leistungs-Verhältnis2%

“Schade ums Geld”

Auslaufsicher2%

“Undicht”

Top return reasons

Gesamtgröße33%
Filterung15%
Funktionalität insgesamt11%
Stärke7%
Defekt Material/Teile7%
Kompatibilität – insgesamt5%
Haltbarkeit3%
Geräuschpegel3%
beworben Vs Tatsächliches Produkt3%
Produktzustand2%