Is 6 inch carbon filter profitable to sell on Amazon United States?

The niche generates $125K/yr across 18 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -10.7%. Flapen's verdict: Skip it (34/100).

How competitive is the 6 inch carbon filter niche?

7 brands and 9 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 97% of demand.

What do buyers complain about in 6 inch carbon filter?

Top complaints mined from reviews: Value For Money, Refills-Overall, Filtration. The return rate is 2.6%.

When does demand for 6 inch carbon filter peak?

Demand is steady year-round — the busiest month runs 1.4× the quietest.

What does it cost to enter the 6 inch carbon filter niche?

Listings span $19.89–$206.81; the average listing price is $85.22 (sweet spot $15–$100). The average incumbent carries 2,793 reviews — the moat a new listing must climb.

6 inch carbon filter

Skip it

Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.

Avg price

Great$85.22

avg listing price — sweet spot $15–$100

Returns

Good2.6%

return rate — above 5% kills the launch gate

Conversion

Okay3.5%

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

Price range

Okay$19.89–$206.81

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

Review moat

Okay2,792.67

avg incumbent reviews — the moat a new listing must climb

Competition

Okay65%

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

Market size

Okay$125K

$125K/yr · 42K searches

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Growth

Bad-10.7%

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

Brand share

Bad97%

top-5 brand share — brand-locked demand

Signals High Price

According to Flapen's Amazon United States niche tracking, 6 inch carbon filter is a $125K/yr Amazon United States market (42K searches/yr). The top 5 brands hold 97% of demand. Verdict: Skip it — 34/100.

Data updated Jul 14, 2026 · scored weekly · How we score niches

6 inch carbon filter market data

Units sold / yr: 2K–3K; avg 100–250/product
Revenue / yr: $170K–$213K; units × avg price
Conversion rate: 3.5%
Avg BSR: #88
Page quality: 0%
Prime: 100%
Sponsored: 89%
Out of stock: 7.7%
Avg brand age: 50 months
Avg seller age: 187 days

Competition & brand share

The top 5 products take 65% of clicks — established leaders, but buyers still shop beyond them.

Brands

7 flat

Sellers

Top-5 brand share

97%

Top 20: 100%

Top-5 click share

65%

Top 20: 100%

Open market

AC Infinity57%
VIVOSUN18%
MELONFARM14%
HYDROWE5%
Atomic Innovations2%
Spider Farmer2%
Open — no brand owns it (1 brand, 1%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -10.7% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.4×

Open Trend

Top 6 inch carbon filter search terms

6 inch carbon filter15K/yr -8.8%4.6% conv.
ac infinity carbon filter9K/yr +9.4%3.5% conv.
6 carbon filter7K/yr -27.7%4.6% conv.
ac infinity filter5K/yr -17.0%3.2% conv.
6 inch carbon filter for grow tent4K/yr -12.8%2.1% conv.
ac infinity carbon filter 6 inch3K/yr -23.0%10.4% conv.

All search terms

Top 6 inch carbon filter 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 18 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

AC Infinity Air Carbon Filter 6 with Premium Australian Virgin Charcoal for Inline Duct Fan Odor Control Hydroponics Grow Rooms

AC Infinity$69.834.8★10,232 rev

VIVOSUN 6 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal for Inline Duct Fan Grow Tent Pre-Filter Included Reversible Flange 6x 16

VIVOSUN$58.264.6★10,055 rev

MELONFARM 6 Air Carbon Filter Smelliness Control with Australia Virgin Charcoal Odor Removal Carbon Filter for Grow Tent Inline Fan Hydroponics Pre-Filter Included Insulated Flange 6 x 11.8

MELONFARM$46.004.4★754 rev

AC Infinity Refillable Carbon Filter Kit 6 with Additional Refill Odor Removal Air Scrubber for 6 Inline Fan and Ducting Reusable Charcoal Filter for Grow Tent Grow Room Hydroponics

AC Infinity$138.604.7★496 rev

AC Infinity Air Carbon Filter 4 with Premium Australian Virgin Charcoal for Inline Duct Fan Odor Control Hydroponics Grow Rooms

AC Infinity$49.654.8★10,232 rev

Newest

by launch date

MELONFARM 6 Inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal Odor Removal Carbon Filter for Grow Tent Inline Fan Pre-Filter Included 6 x8.26

MELONFARM$38.972 rev

2mo ago

MELONFARM 6 inch Air Carbon Filter Smelliness Control with Australia Virgin Charcoal Built-in 14cm Fan Low Nois and Speed Controller Smelliness Scrubber for Inline Duct Fan Grow Tent 6 x 13.4

MELONFARM$60.76754 rev

10mo ago

CANNABMALL 6 Inch Replacement Air Carbon Filter 38mm Smellines Control Filtration with Australia Virgin Charcoal for Grow Tent Inline Duct Fan Hydroponics Odor Scrubber Greenhouse Breeding Farm

CANNABMALL$43.190 rev

1y ago

MELONFARM 6 Air Carbon Filter Smelliness Control with Australia Virgin Charcoal Odor Removal Carbon Filter for Grow Tent Inline Fan Hydroponics Pre-Filter Included Insulated Flange 6 x 11.8

MELONFARM$46.00754 rev

2y ago

AC Infinity Refillable Carbon Filter Kit 6 with Additional Refill Odor Removal Air Scrubber for 6 Inline Fan and Ducting Reusable Charcoal Filter for Grow Tent Grow Room Hydroponics

AC Infinity$138.60496 rev

2y ago

What buyers say about 6 inch carbon filter

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

What buyers love

Filtration23%

“this filter is just as high quality as everything else I've ever purchased from them”

Quality-Overall16%

“this filter is just as high quality as everything else I've ever purchased from them”

Smell14%

“Eliminates even the dankiest odors”

Advertised Vs Actual Product14%

“Better than expected”

Value For Money6%

“Great price”

Refills-Overall5%

“Useful refill kit”

Strength3%

“Solid design, decent seals”

Ease Of Use3%

“nothing unusual or hard to deal with”

Size-Overall3%

“Very good for 3 x 4 tent”

Storage Capacity2%

“giving far more room inside”

What buyers complain about

Value For Money18%

“Expensive”

Refills-Overall13%

“Doesnt work once refilled”

Filtration13%

“completely defective low quality filter”

Size-Overall10%

“The 6 was larger than I expected”

Smell7%

“I ended up getting a second filter because hubby thought it smelled”

Quality-Overall7%

“Completely defective low quality”

Functionality-Overall7%

“The last one I bought is not working at all”

Flexibility7%

“it's bend in one side”

Durability7%

“so I can't give an estimate of how long it lasts”

Top return reasons

Size-Overall56%

Advertised Vs Actual Product8%

Filtration7%

Compatibility-Overall5%

Functionality-Overall5%

Value For Money4%

Defective Material/Parts3%

Product Condition2%

Smell2%

Carbon Footprint2%

Common questions

Is 6 inch carbon filter profitable to sell on Amazon United States?: The niche generates $125K/yr across 18 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -10.7%. Flapen's verdict: Skip it (34/100).
How competitive is the 6 inch carbon filter niche?: 7 brands and 9 sellers compete. The top 5 products take 65% of clicks and top 5 brands hold 97% of demand.
What do buyers complain about in 6 inch carbon filter?: Top complaints mined from reviews: Value For Money, Refills-Overall, Filtration. The return rate is 2.6%.
When does demand for 6 inch carbon filter peak?: Demand is steady year-round — the busiest month runs 1.4× the quietest.
What does it cost to enter the 6 inch carbon filter niche?: Listings span $19.89–$206.81; the average listing price is $85.22 (sweet spot $15–$100). The average incumbent carries 2,793 reviews — the moat a new listing must climb.