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co2 anlage aquarium

Skip it

Soft demand (-43.1% this quarter) — this niche doesn't clear our bar today.

Market size 43Growth 3Conversion 19Competition 60Returns 84Price range 33Avg price 85Brand share 48Review moat 79Quality gap 80

Avg price

Great€71.58

avg listing price — sweet spot $15–$100

Returns

Great1.6%

return rate — above 5% kills the launch gate

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Review moat

Great421.31

avg incumbent reviews — the moat a new listing must climb

Competition

Good49%

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

Brand share

Okay76%

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

Market size

Okay€226K

€226K/yr · 205K searches

Price range

Okay€5.20–€262.30

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

Conversion

Bad1.5%

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

Growth

Bad-43.1%

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

According to Flapen's Amazon Germany niche tracking, co2 anlage aquarium is a €226K/yr Amazon Germany market (205K searches/yr). The top 5 brands hold 76% of demand. Demand peaks in Jan–Feb–Nov. Verdict: Skip it — 49/100.

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

co2 anlage aquarium market data

Units sold / yr
3K–4K
avg 100–250/product
Revenue / yr
€215K–€286K
units × avg price
Conversion rate
1.5%
Avg BSR
#340
Page quality
0%
Prime
55%
Sponsored
76%
Out of stock
4.7%
Avg brand age
51 months
Avg seller age
184 days

Competition & brand share

The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.

Brands

16 falling

Sellers

58

Top-5 brand share

76%

Top 20: 100%

Top-5 click share

49%

Top 20: 90%

Open market

20%

  • JBL35%
  • Q Grow Innovative Aqua Tools14%
  • Tetra13%
  • Dennerle8%
  • NICREW6%
  • FZONE4%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -43.1% search growth over the last 90 days.
6K4KPrime Day '24Spike '24Holiday '24Spike '25Prime Day '25Black Friday '25SepDecMarJunAugNovMarMay

Peak months: Jan, Feb, Nov · busiest ÷ quietest = 2.1×

Top co2 anlage aquarium search terms

  • co2 aquarium75K/yr
  • co2 anlage aquarium37K/yr
  • aquarium co2 anlage18K/yr
  • aquarium co215K/yr
  • co2 anlage aquarium komplett-set12K/yr
  • jbl co29K/yr
  • bio co2 anlage für aquarium7K/yr
  • co2 aquarium set6K/yr
  • co2 anlage6K/yr
  • co2 dünger aquarium5K/yr
All search terms

Top co2 anlage 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%5%€11K10%€23K15%€34K20%€45K1101001K10K 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 24 tracked products in this niche — three views at once, no toggling.

What buyers say about co2 anlage aquarium

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

What buyers love

Qualität insgesamt34%

“Super Produkt”

Preis-Leistungs-Verhältnis19%

“günstig”

beworben Vs Tatsächliches Produkt12%

“Alles wie es soll”

Benutzerfreundlichkeit6%

“Durch die einfache Handhabung”

Design insgesamt5%

“Schönes Design zum hervorragenden Preis”

Einstellbarkeit/Drehbarkeit/lehnend3%

“leicht einstellbar”

Anleitung/Benutzerhandbuch/Fehlerbehebung3%

“danke guter Anleitung”

Gesamtgröße2%

“Passt”

Filterung2%

“einer vernünftigen Filterung”

Kompatibilität – insgesamt2%

“Auch der Betrieb mit einem Adapter für SodaStream-Zylinder klappt problemlos”

What buyers complain about

Funktionalität insgesamt21%

“Null Wirkung”

Haltbarkeit14%

“Fällt immer wieder ab”

Qualität insgesamt13%

“Ich war sehr skeptisch, ob man wirklich für wenig Geld ein gutes Produkt erhält”

Anleitung/Benutzerhandbuch/Fehlerbehebung7%

“Auch beim Thema Anleitung hat man versucht sich Mühe zu geben, wie ich finde allerdings nicht zielführend”

Preis-Leistungs-Verhältnis6%

“Für den Preis absolut ungenügend”

Defekt Material/Teile4%

“Artikel schlecht”

Geruch4%

“riecht nach Strom”

Kontamination4%

“Algenwachstum geht merklich zurück”

Benutzerfreundlichkeit4%

“Weniger Anwendungen als vorgeschrieben”

Produktzustand4%

“Warscheinlich nicht neu”

Top return reasons

Funktionalität insgesamt23%
Gesamtgröße17%
Defekt Material/Teile14%
Auslaufsicher9%
Produktzustand8%
Kompatibilität – insgesamt6%
Geruch5%
Qualität insgesamt3%
beworben Vs Tatsächliches Produkt3%
Anleitung/Benutzerhandbuch/Fehlerbehebung2%

Common questions

Is co2 anlage aquarium profitable to sell on Amazon Germany?
The niche generates €226K/yr across 29 tracked products. 0 of 5 products launched in the last 360 days are still selling. 90-day search growth is -43.1%. Flapen's verdict: Skip it (49/100).
How competitive is the co2 anlage aquarium niche?
16 brands and 58 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 76% of demand.
What do buyers complain about in co2 anlage aquarium?
Top complaints mined from reviews: Funktionalität insgesamt, Haltbarkeit, Qualität insgesamt. The return rate is 1.6%.
When does demand for co2 anlage aquarium peak?
Demand peaks in Jan–Feb–Nov; the busiest month runs 2.1× the quietest.
What does it cost to enter the co2 anlage aquarium niche?
Listings span €5.20–€262.30; the average listing price is €71.58 (sweet spot $15–$100). The average incumbent carries 421 reviews — the moat a new listing must climb.