---
title: "Carbon Filter for Aquarium — $105K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/carbon-filter-for-aquarium"
last_updated: "2026-07-21T19:36:52.960Z"
locale: en
meta:
description: "Niche score 51/100 · $105K/yr market · 63K searches/yr · $32.29 avg price. Soft demand (-21.0% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · $105K/yr market · 63K searches/yr · $32.29 avg price. Soft demand (-21.0% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Carbon Filter for Aquarium — $105K/yr Amazon US Niche (2026) - Flapen"
---
# **carbon filter for aquarium**
**Worth a look**
Shows a sweet-spot price point ($32.29 avg), but soft demand (-21.0% this quarter) keeps it on the watch list.
Market size 26Growth 15Conversion 60Competition 77Returns 86Price range 41Avg price 95Brand share 40Review moat 65Quality gap 50
**Avg price**
**Incredible****$32.29**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.5%**
return rate — above 6% kills the launch gate
**Competition**
**Great****38%**
top-5 click share — an open shelf
**Review moat**
**Good****902.4**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Good****5.2%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Good****4.5★**
avg incumbent rating — lower means beatable quality
**Price range**
**Okay****$6.39–$211.38**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Brand share**
**Okay****81%**
top-5 brand share — brands hold most of the demand
**Market size**
**Okay****$105K**
$105K/yr · 63K searches
**Growth**
**Bad****-21.0%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, carbon filter for aquarium is a $105K/yr Amazon United States market (63K searches/yr). The top 5 brands hold 81% of demand. Demand peaks in Jan–Feb–Mar–Nov–Dec. Verdict: Worth a look — 51/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **carbon filter for aquarium market data**
- **Units sold / yr**
- **4K–5K**
- avg 100–250/product
- **Revenue / yr**
- **$129K–$161K**
- units × avg price
- **Launch success**
- **22%**
- 4 of 18 new (360d)
- **Conversion rate**
- **5.2%**
- **Avg BSR**
- **#556**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **71%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **26 months**
- **Avg seller age**
- **164 days**
## **Competition & brand share**
Clicks spread well past the top 5 (38% combined) — an open shelf where new products get seen.
**Brands**
**17 **▲rising
**Sellers**
**59**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**38%**
Top 20: 79%
**Open market**
**16%**
- Fluval62% - IFERLA8% - beaufan4% - Aolleteau4% - LWPLWA3% - Magluv3% - Open — no brand owns it (11 brands, 16%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -21.0% search growth over the last 90 days.
3K2KSpike '24Holiday '24Prime Day '25Spike '25 seasonSepDecMarJunAugNovMarMay
Peak months: Jan, Feb, Mar, Nov, Dec · busiest ÷ quietest = 2.9×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/carbon-filter-for-aquarium/trend)
## **Top carbon filter for aquarium search terms**
- **fluval 407 replacement parts**20K/yr-27.4%5.9% conv. - **fluval 307 replacement parts**13K/yr-13.3%7.0% conv. - **fluval replacement parts**8K/yr-5.8%1.7% conv. - **fluval 407 parts**7K/yr-18.8%5.0% conv. - **fluval 306 replacement parts**6K/yr-31.1%6.8% conv. - **fluval 307 parts**5K/yr-26.2%4.9% conv. - **fluval parts**4K/yr-24.3%1.4% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/carbon-filter-for-aquarium/search-terms)
## **Top carbon filter for 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%3%$3K6%$6K9%$9K12%$13K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 42 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Fluval A20061 X06 AquaStop Valve**Fluval**$21.40**4.7★2,978 rev](https://www.amazon.com/dp/B0077EEBRA) [2**Fluval Intake/Outlet Kit for 307/407 Filters (A446 A449)**Fluval**$40.25**4.2★101 rev](https://www.amazon.com/dp/B08MH3R8GK) [3**Fluval 407 Motor Head Maintenance Kit for Canister Filter**Fluval**$28.38**4.5★310 rev](https://www.amazon.com/dp/B07VVKGP27) [4**Intake/Output Replacement Kit for 307/407 Canister Filters (A446 A449)**Fluval**$42.24**4.6★162 rev](https://www.amazon.com/dp/B08N39RX99) [5**Fluval 307 Motor Head Maintenance Kit for Canister Filter**Fluval**$26.75**4.5★268 rev](https://www.amazon.com/dp/B07VWNFDM6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**46-Pack Aquarium Maintenance Media Kits Replacement for Fluval 306/307 Performance Canister Filter Includes Nitrite-Absorbing Filter Pad/Phosphate-Absorbing Filter Pad/Ammonia-Absorbing Pad**Aolleteau**$52.94**7 rev4mo ago](https://www.amazon.com/dp/B0GRV6688X) [**A20015 Ribbed Hose Replacement for Fluval 307 407 306 406 305 405 Canister Filter Hose for Fluval Aquarium Filter Tubing Replacement Parts 9.8Ft**Zelvaron**$16.61**5 rev4mo ago](https://www.amazon.com/dp/B0GRD3SWDJ) [**LWPLWA A20126 Primer Assembly with Cover for Fluval 07 Series Filter for Fluval 107 207 307 407 Canister Filter Replacement Parts**LWPLWA**$15.45**10 rev5mo ago](https://www.amazon.com/dp/B0GL1BX53S) [**XwaYexa A20015 Ribbed Hosing 9.8Ft Replacement Hose Aquarium Filter Tubing for Fluval 304/305/306/307 and 404/405/406/407 Canister Filters**XwaYexa**$16.34**10 rev5mo ago](https://www.amazon.com/dp/B0GHR5173W) [**PROUDSCREW 30 Pack Replacement Filter Media Kit Compatible with Fluval 306/307 Aquarium Filters Including Bio Ceramic Rings Activated Carbon Blue White & Black Bio Foam Value Pack**PROUDSCREW**$40.22**6 rev5mo ago](https://www.amazon.com/dp/B0G9QJ7SDW)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**46-Pack Aquarium Maintenance Media Kits Replacement for Fluval 306/307 Performance Canister Filter Includes Nitrite-Absorbing Filter Pad/Phosphate-Absorbing Filter Pad/Ammonia-Absorbing Pad**Aolleteau**$52.94**5.0★**▲ 341%**](https://www.amazon.com/dp/B0GRV6688X) [**A20015 Ribbed Hose Replacement for Fluval 307 407 306 406 305 405 Canister Filter Hose for Fluval Aquarium Filter Tubing Replacement Parts 9.8Ft**Zelvaron**$16.61**3.4★**▲ 338%**](https://www.amazon.com/dp/B0GRD3SWDJ) [**LWPLWA A20126 Primer Assembly with Cover for Fluval 07 Series Filter for Fluval 107 207 307 407 Canister Filter Replacement Parts**LWPLWA**$15.45**2.8★**▲ 257%**](https://www.amazon.com/dp/B0GL1BX53S) [**2 Pack Rim Connector Replacement for Fluval Fx4/Fx5/Fx6 Parts High Performance Canister Filter Accessories Hose Fitting Rim Connector and Clips Bracket Adapter Parts for Aquarium Fish Tank Filters**IFERLA**$22.30**4.4★**▲ 190%**](https://www.amazon.com/dp/B0FZJKC435) [**JZSMY Impeller Replacement for Fluval 307 Canister Filter Premium Magnetic Rotor Spare Part High Efficiency Water Flow Durable Aquarium Filter Repair Accessory Precise Fit & Long Lasting**JZSMY**$18.53**5.0★**▲ 181%**](https://www.amazon.com/dp/B0FZ9W25PN)
**~~View all trending →~~**
## **What buyers say about carbon filter for aquarium**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**24%
*“Fits perfectly”*
**Filtration**15%
*“Great filter”*
**Value For Money**12%
*“Worth every Penny”*
**Quality-Overall**11%
*“Quality product does exactly as advertised”*
**Advertised Vs Actual Product**9%
*“As advertised”*
**Leak-Proof**4%
*“do not leak”*
**Compatibility-Overall**3%
*“Works for the 407”*
**Spray/Flow**2%
*“The spray bar works pretty well”*
**Ease Of Use**2%
*“Easy to use”*
**Ease Of Cleaning**2%
*“easy to rinse”*
### **What buyers complain about **
**Filtration**9%
*“The quality of this brand-new filter was so poor”*
**Leak-Proof**8%
*“Leaked immediately”*
**Quality-Overall**7%
*“they've seen a recent quality decline”*
**Durability**6%
*“They break easily”*
**Product Condition**6%
*“Sold me a used item”*
**Value For Money**6%
*“Really cheap product especially for a ridiculous price”*
**Size-Overall**5%
*“does not fit model stated”*
**Ease Of Cleaning**4%
*“they are dirty”*
**Compatibility-Overall**4%
*“Not compatible with the canister as advertised”*
**Functionality-Overall**3%
*“Does not work”*
### **Top return reasons **
**Size-Overall**35%
**Defective Material/Parts**16%
**Filtration**12%
**Compatibility-Overall**8%
**Leak-Proof**6%
**Product Condition**4%
**Advertised Vs Actual Product**4%
**Value For Money**3%
**Functionality-Overall**3%
**Spray/Flow**1%
## **Common questions**
- **Is carbon filter for aquarium profitable to sell on Amazon United States?**
- The niche generates $105K/yr across 42 tracked products. 4 of 18 products launched in the last 360 days are still selling. 90-day search growth is -21.0%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the carbon filter for aquarium niche?**
- 17 brands and 59 sellers compete. The top 5 products take 38% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in carbon filter for aquarium?**
- Top complaints mined from reviews: Filtration, Leak-Proof, Quality-Overall. The return rate is 1.5%.
- **When does demand for carbon filter for aquarium peak?**
- Demand peaks in Jan–Feb–Mar–Nov–Dec; the busiest month runs 2.9× the quietest.
- **What does it cost to enter the carbon filter for aquarium niche?**
- Listings span $6.39–$211.38; the average listing price is $32.29 (sweet spot $15–$100). The average incumbent carries 902 reviews — the moat a new listing must climb.
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