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53

aquarium

Worth a look

Shows low returns (0.5%), but weak search conversion (0.4%) keeps it on the watch list.

Market size 65Growth 9Conversion 5Competition 69Returns 98Price range 33Avg price 86Brand share 47Review moat 46Quality gap 83

Returns

Incredible0.5%

return rate — above 6% kills the launch gate

Avg price

Great€69.67

avg listing price — sweet spot $15–$100

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Competition

Good43%

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

Market size

Good€626K

€626K/yr · 2.2M searches

Brand share

Okay77%

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

Review moat

Okay1,907.18

avg incumbent reviews — the moat a new listing must climb

Price range

Okay€5.83–€263.47

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

Growth

Bad-33.0%

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

Conversion

Bad0.4%

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

Competition

The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 falling

Sellers

30

Top-5 brand share

77%

Open market

19%

  • Tetra23%
  • Craftsboys22%
  • Vehipa17%
  • VIALIA9%
  • Nobleza5%
  • Fluval4%

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%4%€25K8%€50K12%€75K16%€100K1101001K10K100K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

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

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -33.0% search growth over the last 90 days.
60K40KPrime Day '24Spike '24Black Friday '24Prime Day '25Spike '25Black Friday '25SepDecMarJunAugNovMarMay

Peak months: Jan · busiest ÷ quietest = 1.8×

Reviews

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

What buyers love

Qualität insgesamt27%

“Super Aquarium, top Verarbeitung”

Preis-Leistungs-Verhältnis15%

“Preis-Leistung Super”

beworben Vs Tatsächliches Produkt9%

“Erfüllt sein Zweck”

Gesamtgröße7%

“Passt”

Design insgesamt5%

“Schönes Design, sieht sehr schick aus”

Benutzerfreundlichkeit5%

“Schnell und unkompliziert”

Filterung3%

“Filter”

Geschmack insgesamt3%

“Shrimpies yummyumm”

Haltbarkeit3%

“Hält lange”

Helligkeit/Glanz/Glühen3%

“LED - Beleuchtung sehr schön”

What buyers complain about

Filterung14%

“War leider am 2. TAG schon die Filterpumpe defekt”

Gesamtgröße11%

“Kleine Aquarium”

Haltbarkeit10%

“die Pumpe war nach 5 Minuten laufen kaputt”

Qualität insgesamt7%

“Minderwertige Qualität und fest eingebautes Pumpengehäuse”

Wasserfluss6%

“Wasserwechsel total umständlich”

beworben Vs Tatsächliches Produkt6%

“Abbildung entspricht nicht dem gelieferten Produkt”

Heizung5%

“Heizstab funktioniert nicht”

Montage/Installation3%

“Montage nach Anleitung der Pumpe verbesserungswürdig”

Preis-Leistungs-Verhältnis3%

“Evtl etwas teuer”

Auslaufsicher2%

“Läuft aus”

Top return reasons

Gesamtgröße46%
Filterung9%
Auslaufsicher6%
Defekt Material/Teile6%
Funktionalität insgesamt4%
Qualität insgesamt4%
Wasserbeständigkeit3%
beworben Vs Tatsächliches Produkt3%
Kompatibilität – insgesamt2%
Haftung/Klebrigkeit2%