co2 regulator aquarium
Skip itBrand-locked demand (top 5 brands take 99% of clicks) — this niche doesn't clear our bar today.
Review moat
Great246.21avg incumbent reviews — the moat a new listing must climb
Avg price
Great$71.23avg listing price — sweet spot $15–$100
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Price range
Good$29.95–$132.10cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Okay5.8%return rate — above 6% kills the launch gate
Competition
Bad72%top-5 click share — a locked-up shelf
Conversion
Bad1.8%search→purchase rate — share of searches ending in a sale
Growth
Bad-22.6%90-day search growth — must beat 0% to launch
Market size
Bad$37K$37K/yr · 29K searches
Brand share
Bad99%top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, co2 regulator aquarium is a $37K/yr Amazon United States market (29K searches/yr). The top 5 brands hold 99% of demand. Verdict: Skip it — 33/100.
Data updated Jul 17, 2026 · scored weekly · How we score niches
co2 regulator aquarium market data
- Units sold / yr
- 750–1K
- avg 0–100/product
- Revenue / yr
- $53K–$71K
- units × avg price
- Launch success
- 50%
- 3 of 6 new (360d)
- Conversion rate
- 1.8%
- Avg BSR
- #389
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 93%
- Out of stock
- 5.0%
- Avg brand age
- 53 months
- Avg seller age
- 216 days
Competition & brand share
The top 5 products capture 72% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
9
Top-5 brand share
99%
Top 20: 100%
Top-5 click share
72%
Top 20: 100%
Open market
0%
- FZONE61%
- Hygger CO229%
- Clscea3%
- Dmzosmd3%
- DaToo2%
- MostAqua2%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -22.6% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top co2 regulator 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.
All 14 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
FZONE Aquarium Co2 Regulator DC Solenoid with Bubble Counter and Check Valve Plant Grow DIY CO2 System CGA320 Side Open Cylinder
FZONE$53.954.2★1,662 rev
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
FZONE$46.934.4★52 rev
Hygger CO2 Aquarium Co2 Regulator Dual Gauge Accurate Display with 12V DC Solenoid Valve Bubble Counter and Check Valve for Establishing CO2 System in Aquatic Plant Tank
Hygger CO2$52.294.4★60 rev
FZONE Pro Series Aquarium Dual Stage CO2 Regulator Adjustable Output Pressure with DC Solenoid and Integrated High Precision Needle Valve and Bubble Counter
FZONE$129.584.2★651 rev
Hygger CO2 Upgraded Aquarium CO2 Regulator with Motorized Valve Dual Stage Adjustable Pressure Expandable for Two Tanks Includes Timer and Bubble Counters for CO2 Aquarium System
Hygger CO2$127.084.5★20 rev
Newest
by launch dateHygger CO2 Upgraded Aquarium CO2 Regulator with Motorized Valve Dual Stage Adjustable Pressure Expandable for Two Tanks Includes Timer and Bubble Counters for CO2 Aquarium System
Hygger CO2$127.0820 rev
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
FZONE$46.9352 rev
Complete Aquarium CO2 System Desktop CO2 Regulator with 45g Disposable CO2 Cartridge Compatible with 5/8 and 3/8 Threaded for Nano Aquariums
Hygger CO2$59.4056 rev
Dmzosmd Dual Stage CO2 Regulator Aquarium
Dmzosmd$94.015 rev
Aquarium Co2 Regulator Mini CO System with Upgraded DC Solenoid and Bubble Counter Check Valve Detachable Design for Building CO System in Aquatic Plant Tank
Hygger CO2$40.8222 rev
Trending
90-day click momentumComplete Aquarium CO2 System Desktop CO2 Regulator with 45g Disposable CO2 Cartridge Compatible with 5/8 and 3/8 Threaded for Nano Aquariums
Hygger CO2$59.404.0★
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
FZONE$46.934.4★
Hygger CO2 Upgraded Aquarium CO2 Regulator with Motorized Valve Dual Stage Adjustable Pressure Expandable for Two Tanks Includes Timer and Bubble Counters for CO2 Aquarium System
Hygger CO2$127.084.5★
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
FZONE$46.974.3★
MostAqua Aquarium Dual Stage Co2 Regulator Pro-Master Series Co2 System Kit for Aquarium Plants Integrated Bubble Counter and Adjustable Output Pressure
MostAqua$132.103.9★
What buyers say about co2 regulator aquarium
What buyers praise and complain about, mined from review topics.What buyers love
“Top quality and super easy to setup and use”
“Nice for the price”
“the cartridge fits as it should”
“Easy to use”
“Mine does not leak”
“Well made, super durable and seems to be super well made”
“Fortunately the directions were clear”
“it looks sleek”
“Does the Job”
“It works perfectly”
What buyers complain about
“this thing leak”
“It blew up on the first try”
“This product is trash”
“there's no way this thing is working”
“there are serious drawbacks”
“Not Paintball CO2 Tank Compatible”
“this comes with poor instructions”
“I ran into a couple of issues getting setup”
“Very misleading”
“the tube itself is too long”
Top return reasons
Common questions
- Is co2 regulator aquarium profitable to sell on Amazon United States?
- The niche generates $37K/yr across 14 tracked products. 3 of 6 products launched in the last 360 days are still selling. 90-day search growth is -22.6%. Flapen's verdict: Skip it (33/100).
- How competitive is the co2 regulator aquarium niche?
- 6 brands and 9 sellers compete. The top 5 products take 72% of clicks and top 5 brands hold 99% of demand.
- What do buyers complain about in co2 regulator aquarium?
- Top complaints mined from reviews: Leak-Proof, Durability, Quality-Overall. The return rate is 5.8%.
- When does demand for co2 regulator aquarium peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the co2 regulator aquarium niche?
- Listings span $29.95–$132.10; the average listing price is $71.23 (sweet spot $15–$100). The average incumbent carries 246 reviews — the moat a new listing must climb.