Aquarium Co2 System
Aquarium Co2 System shows a sweet-spot price point ($58.40 avg), but soft demand (-17.7% this quarter) keeps it on the watch list.
Flapen Score
Top 34% of 3,978 Pet Supplies niches · +3 vs the category median of 51
Is Aquarium Co2 System profitable on Amazon?
According to Flapen's Amazon United States niche tracking, Aquarium Co2 System is a $300K/yr Amazon United States market (284K searches/yr). The top 5 brands hold 84% of demand. Verdict: Worth a look — 54/100.
Aquarium Co2 System: the Amazon niche in one read
Everything a seller checks before entering, in three answers.
Is the demand real?
Worth a look. Search demand moved -17.7% over the last 90 days and 1.8% of searches end in a purchase.
$300K
revenue / yr
Who owns the niche?
The top 5 brands hold 84% of demand, so 16% of the market is open.
16%
open market share
Is there a way in?
Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.3★ — the gap to enter on.
0/100
page quality · 32 products
Top Aquarium Co2 System products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.
Top sellers
by 90-day click share
FZONE Desktop Aquarium CO2 System CO2 Regulator with 45g Disposable CO2 Cartridge Compatible with 5/8 and 3/8 Threaded Interfaces Perfect for Nano Aquariums
- Price
- $46.97
- Rating
- 4.3/5
- Reviews
- 140
- Age
- 1y ago
Complete Aquarium CO2 System Desktop CO2 Regulator with 45g Disposable CO2 Cartridge Compatible with 5/8 and 3/8 Threaded for Nano Aquariums
- Price
- $59.40
- Rating
- 4.0/5
- Reviews
- 56
- Age
- 9mo ago
Clscea Aquarium CO2 Generator with Solenoid Valve for Aquarium Plants 1L G600mini
- Price
- $69.53
- Rating
- 4.0/5
- Reviews
- 42
- Age
- 1y ago
2L Aquarium CO2 Generator System CO2 System Kit with Regulator and Needle Valve for Aquarium Plants Tanks
- Price
- $78.29
- Rating
- 4.1/5
- Reviews
- 68
- Age
- 1y ago
Enkreefi 2L Co2 for Aquarium Kit with Double Switch Solenoid Valve Aquarium Co2 Kit with Adjustable Bubble Counter Co2 Aquarium Kit
- Price
- $71.53
- Rating
- 4.8/5
- Reviews
- 27
- Age
- 1y ago
Trending
90-day click momentum
NovAbyss Desktop Complete Aquarium CO2 System CO2 Regulator with 2 Pack (16g) Disposable CO2 Cartridge Aquarium CO2 kit Compatible with 3/8 Thread for Nano Aquariums
- Price
- $49.39
- Rating
- 5.0/5
- Reviews
- 5
- Age
- 3mo ago
FZONE 5L Upgraded Aquarium CO System with Complete Accessories CO Generator kit with Integrated Solenoid & Bubble Counter Safety Valve Main Switch for Planted Tanks
- Price
- $124.36
- Rating
- 4.3/5
- Reviews
- 81
- Age
- 10mo ago
Enkreefi 2L Co2 for Aquarium Kit with Double Switch Solenoid Valve Aquarium Co2 Kit with Adjustable Bubble Counter Co2 Aquarium Kit
- Price
- $71.53
- Rating
- 4.8/5
- Reviews
- 27
- Age
- 1y ago
Complete Aquarium CO2 System Desktop CO2 Regulator with 45g Disposable CO2 Cartridge Compatible with 5/8 and 3/8 Threaded for Nano Aquariums
- Price
- $59.40
- Rating
- 4.0/5
- Reviews
- 56
- Age
- 9mo ago
FZONE Aquarium CO Regulator Kit Compact Aquarium CO System with Diffuser Upgraded DC Solenoid and Bubble Counter Check Valve for Establishing CO System in Aquatic Plant Tank
- Price
- $46.93
- Rating
- 4.4/5
- Reviews
- 52
- Age
- 8mo ago
Newest
by launch dateNovAbyss Desktop Complete Aquarium CO2 System CO2 Regulator with 2 Pack (16g) Disposable CO2 Cartridge Aquarium CO2 kit Compatible with 3/8 Thread for Nano Aquariums
- Price
- $49.39
- Rating
- 5.0/5
- Reviews
- 5
- Age
- 3mo ago
FZONE Aquarium CO Regulator Kit Compact Aquarium CO System with Diffuser Upgraded DC Solenoid and Bubble Counter Check Valve for Establishing CO System in Aquatic Plant Tank
- Price
- $46.93
- Rating
- 4.4/5
- Reviews
- 52
- Age
- 8mo ago
Complete Aquarium CO2 System Desktop CO2 Regulator with 45g Disposable CO2 Cartridge Compatible with 5/8 and 3/8 Threaded for Nano Aquariums
- Price
- $59.40
- Rating
- 4.0/5
- Reviews
- 56
- Age
- 9mo ago
FZONE 2.5L Upgraded Aquarium CO System with Complete Accessories CO Generator kit with Integrated Solenoid & Bubble Counter Safety Valve Main Switch for Planted Tanks
- Price
- $88.15
- Rating
- 4.3/5
- Reviews
- 81
- Age
- 10mo ago
FZONE 5L Upgraded Aquarium CO System with Complete Accessories CO Generator kit with Integrated Solenoid & Bubble Counter Safety Valve Main Switch for Planted Tanks
- Price
- $124.36
- Rating
- 4.3/5
- Reviews
- 81
- Age
- 10mo ago
Competition: brands, sellers & click share
The top 5 products take 43% of clicks — established leaders, but buyers still shop beyond them.
Brands
12 falling
Sellers
42
Top-5 brand share
84%
Top 20: 100%
Top-5 click share
43%
Top 20: 89%
Open market
12%
- FZONE29%
- Hygger CO222%
- Clscea16%
- API10%
- Enkreefi6%
- Fluval4%
- Open — no brand owns it (6 brands, 12%)
Aquarium Co2 System demand & seasonality
Weekly search volume, with the niche's key stats alongside.
No pronounced peak months · busiest ÷ quietest = 1.5×
Top Aquarium Co2 System search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.
- co2 for aquarium30K/yr
- aquarium co2 kit22K/yr
- co2 aquarium kit27K/yr
- aquarium co233K/yr
- co2 generator21K/yr
- co2 aquarium22K/yr
- fzone co28K/yr
- aquarium co2 system30K/yr
- co2 kit for aquarium14K/yr
- co2 system for aquarium16K/yr
What reviews say buyers love and hate about Aquarium Co2 System
What buyers mention most, as a share of all reviews.
What buyers love
78% of reviews“Excellent Product”
“Great value”
“This kit is very easy to use”
“Works as advertised”
“instructions were clear”
What buyers complain about
72% of reviews“Leaking”
“Didnt work as described”
“It blew up on the first try”
“Very poor instructions”
“Unfortunately, as it is there is no way to use it”
Aquarium Co2 System return rate & reasons
Why buyers send it back, as a share of all return requests.
1.4%
Return rate
27%
Fixable by listing
The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.
Common Aquarium Co2 System questions
The questions sellers ask about this niche, answered from the tracked metrics.
Related niches
Same-category niches scoring near this one — the next ones worth researching.
Best Flapen score
The highest-scoring niches we track right now, across every category.
