Aquarium Co2 System
MaybeProducts sell for $58.40 on average, inside the sweet spot. But demand is soft, at -17.7% this quarter, so Aquarium Co2 System is a Maybe.
- Flapen Score
- 54 / 100Top 34% of 3,978 Pet Supplies niches · +3 vs the category median of 5154
- Market size
- $300K/yr284K searches / yr
- 90-day growth
- -17.7%search demand this quarter
- Competition
- 43%top-5 click share · 12 brands · 42 sellers
Flapen Score
Aquarium Co2 System against its category
The dotted line is the Pet Supplies average. Past it, Aquarium Co2 System is stronger. Inside it, weaker.
Market
The Aquarium Co2 System market on Amazon at a glance
Shoppers on Amazon United States searched for Aquarium Co2 System 284K times last year and spent an estimated $300K. The top 5 brands take 84% of clicks. Flapen scores it 54 out of 100, a Maybe.
01 · Demand
An estimated 1.8% of those searches ended in a purchase.
Shoppers searched for this 284K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 1.8% of those searches ended in a purchase. Searches in the last 90 days moved -17.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated $300K a year.
- Searches, last 12 months
- 284K
- Growth, 90 days vs prior 90
- -17.7%
- Conversion, latest week
- 1.8%
- Market size, estimated
- $300Ka year
- Peak month
- May1.5× the quietest month
- Top search term
- co2 for aquarium30K searches a year
02 · Price
A sale here is worth $58.40.
Listings sell for $58.40 on average, from $10.09 to $158.05. Amazon reports units sold in ranges. This niche sold 5K to 6K a year. The average listing sells 100 to 250 of them. At $58.40 that is $6K to $15K a year per listing.
- Average price
- $58.40inside the $15 to $100 sweet spot
- Price range
- $10.09–$158.05
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 5K–6K
- Units per listing a year
- 100–250
- Revenue per listing a year
- $6K–$15K
- Returns
- 1.4%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
84% of listings pay for placement with sponsored ads. 97% ship with Prime. On an average day, 10.7% of listings are out of stock. The average listing ranks #213 within Fish & Aquatic Pets. It carries 707 reviews at 4.26 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 84%
- Prime listings
- 97%
- Out of stock, average day
- 10.7%
- Average rank
- #213in Fish & Aquatic Pets
- Average rating
- 4.26 starsAmazon United States average 4.42 stars
- Average reviews
- 707per listing
- Listings tracked
- 32
04 · Newcomers
7 of last year's 9 launches cleared the first-year sales bar.
9 products launched here in the last 12 months. 7 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 67 months on average, so the names here are established.
- Launched, last 12 months
- 9
- Successful launches
- 7Amazon's first-year sales bar
- Average brand age
- 67 months
Products
Top Aquarium Co2 System products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 17, 2026. The live listing can differ.
Top sellers
by estimated 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
estimated 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 date
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 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
Competition: brands, sellers & click share
The top 5 products take an estimated 43% of clicks. Leaders hold, but buyers still shop past them.
Brands
12 falling
Sellers
42
Est. top-5 brand share
84%
Top 20: 100%
Est. 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%)
Demand
Aquarium Co2 System search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.5×
Search terms
Top Aquarium Co2 System search terms shoppers use
The exact words shoppers type, with estimated 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
Reviews and returns
What reviews say buyers love and hate about Aquarium Co2 System
We read the reviews and the return reasons for every product selling here.
“Leaking”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
16 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Aquarium Co2 System questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









