---
title: "Aquarium Sponge — $318K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/aquarium-sponge"
last_updated: "2026-07-21T17:29:18.070Z"
locale: en
meta:
description: "Niche score 55/100 · $318K/yr market. Brand-locked demand (top 5 brands take 94% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 55/100 · $318K/yr market. Brand-locked demand (top 5 brands take 94% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Aquarium Sponge — $318K/yr Amazon US Niche (2026) - Flapen"
---
# **aquarium sponge**
**Worth a look**
Shows a sweet-spot price point ($37.43 avg), but brand-locked demand (top 5 brands take 94% of clicks) keeps it on the watch list.
Market size 52Growth 52Conversion 55Competition 43Returns 93Price range 62Avg price 95Brand share 14Review moat 64Quality gap 62
**Avg price**
**Incredible****$37.43**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.1%**
return rate — above 6% kills the launch gate
**Review moat**
**Good****920.15**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Price range**
**Good****$2.56–$139.41**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****4.5%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****$318K**
$318K/yr · 186K searches
**Growth**
**Good****+22.6%**
90-day search growth — must beat 0% to launch
**Competition**
**Okay****59%**
top-5 click share — leaders hold, buyers still browse
**Brand share**
**Bad****94%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, aquarium sponge is a $318K/yr Amazon United States market (186K searches/yr). The top 5 brands hold 94% of demand. Demand peaks in May–Jun. Verdict: Worth a look — 55/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **aquarium sponge market data**
- **Units sold / yr**
- **8K–10K**
- avg 250–500/product
- **Revenue / yr**
- **$299K–$374K**
- units × avg price
- **Launch success**
- **—**
- 0 of 0 new (360d)
- **Conversion rate**
- **4.5%**
- **Avg BSR**
- **#107**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **75%**
- **Out of stock**
- **0.3%**
- **Avg brand age**
- **49 months**
- **Avg seller age**
- **175 days**
## **Competition & brand share**
The top 5 products take 59% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**8 **▼falling
**Sellers**
**21**
**Top-5 brand share**
**94%**
Top 20: 100%
**Top-5 click share**
**59%**
Top 20: 100%
**Open market**
**4%**
- ALEGI42% - GUTTERSTUFF23% - AQUANEAT20% - Pawfly7% - Borlech3% - koxuyim2% - Open — no brand owns it (2 brands, 4%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +22.6% search growth over the last 90 days.
5K4KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/aquarium-sponge/trend)
## **Top aquarium sponge search terms**
- **aquarium sponge**33K/yr-5.8%5.8% conv. - **gutter foam**23K/yr+51.9%0.5% conv. - **filter foam**20K/yr+7.4%4.2% conv. - **aquarium foam**20K/yr+2.6%3.7% conv. - **matala filter media pads**9K/yr+87.9%1.2% conv. - **aquarium filter foam**13K/yr+0.4%4.2% conv. - **matala**7K/yr+62.1%0.3% conv. - **foam filter**10K/yr+8.2%2.1% conv. - **foam gutter inserts**4K/yr+188.4%0.4% conv. - **gutter foam inserts**7K/yr+61.1%0.2% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/aquarium-sponge/search-terms)
## **Top aquarium sponge 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%10%$32K20%$64K30%$95K40%$127K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 20 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**ALEGI Aquarium Sponge Filter Pad Bio Filter Media Foam Sponges Cut-to-Size Foam for Fish Tank (20x20x1 (20PPI))**ALEGI**$9.03**4.7★1,939 rev](https://www.amazon.com/dp/B0C99S8J7D) [2**AQUANEAT 2 Pack Aquarium Bio Sponge Filter Media Pad Cut-to-Size Open Cell Foam Sheet for Fish Tank Sump (9 x 9 x 0.5) Black**AQUANEAT**$6.07**4.6★370 rev](https://www.amazon.com/dp/B0BZNNH2B7) [3**Pawfly 4 Pack Aquarium Bio Sponge Filter Media Pad Filter Foam Sponge Pads Cut-to-Size Foam for Fish Tank Filters Sumps Ponds Hydroponics 6.3 x 5.5 x 0.78**Pawfly**$6.01**4.5★281 rev](https://www.amazon.com/dp/B0DJW148YJ) [4**GutterStuff Original Gutter Guard - 4-Inch K Style Foam Gutter Filter Insert with Year Round Leaf Protection & Easy DIY Installation - GSK432-2**GUTTERSTUFF**$64.10**4.1★794 rev](https://www.amazon.com/dp/B07DXC6N17) [5**Pro Gutter Guard - 5-Inch K Style Foam Gutter Filter Insert with Year Round Leaf Protection & Easy DIY Installation - GSK532-3**GUTTERSTUFF**$109.29**3.9★98 rev](https://www.amazon.com/dp/B003H9LXQQ)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Borlech Aquarium Bio Filter Sponge Pad - Cut-to-Size Aquarium Filter Media for Fish Tank Pond Sump - Mechanical & Biological Filtration (18.5x18.5x0.8 20PPI 1 Pack)**Borlech**$8.52**773 rev1y ago](https://www.amazon.com/dp/B0F186PLPN) [**Pawfly 4 Pack Aquarium Bio Sponge Filter Media Pad Filter Foam Sponge Pads Cut-to-Size Foam for Fish Tank Filters Sumps Ponds Hydroponics 6.3 x 5.5 x 0.78**Pawfly**$6.01**281 rev1y ago](https://www.amazon.com/dp/B0DJW148YJ) [**ALEGI Aquarium Sponge Filter Pad Bio Filter Media Foam Sponges Cut-to-Size Foam for Fish Tank (20x20x1 (20PPI))**ALEGI**$9.03**1,939 rev3y ago](https://www.amazon.com/dp/B0C99S8J7D) [**ALEGI Aquarium Sponge Filter Pad Bio Filter Media Foam Sponges Cut-to-Size Foam for Fish Tank (20x20x1 (50PPI))**ALEGI**$8.97**1,939 rev3y ago](https://www.amazon.com/dp/B0C99RRDTW) [**ALEGI Aquarium Sponge Filter Pad Bio Filter Media Foam Sponges Cut-to-Size Foam for Fish Tank (20x20x1 (35PPI))**ALEGI**$9.02**1,939 rev3y ago](https://www.amazon.com/dp/B0C99P2XH6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Pro Gutter Guard - 5-Inch K Style Foam Gutter Filter Insert with Year Round Leaf Protection & Easy DIY Installation - GSK532-3**GUTTERSTUFF**$109.29**3.9★**▲ 155%**](https://www.amazon.com/dp/B003H9LXQQ) [**GutterStuff Original Gutter Guard - 6-Inch K Style Foam Gutter Filter Insert with Year Round Leaf Protection & Easy DIY Installation - GSK632-2**GUTTERSTUFF**$100.31**4.1★**▲ 123%**](https://www.amazon.com/dp/B07DXJ4YWR) [**GutterStuff Original Gutter Guard - 4-Inch K Style Foam Gutter Filter Insert with Year Round Leaf Protection & Easy DIY Installation - GSK432-2**GUTTERSTUFF**$64.10**4.1★**▲ 82%**](https://www.amazon.com/dp/B07DXC6N17) [**GutterStuff Original Gutter Guard - 5-Inch Half Round Foam Gutter Filter Insert with Year Round Leaf Protection & Easy DIY Installation - GSR532-2**GUTTERSTUFF**$64.49**3.9★**▲ 68%**](https://www.amazon.com/dp/B07DXFJ25G) [**GutterStuff EZ Gutter Guard - 5-Inch K Style Foam Gutter Filter Insert with Year Round Leaf Protection & Easy DIY Installation - GSK532-1**GUTTERSTUFF**$62.80**3.7★**▲ 67%**](https://www.amazon.com/dp/B07L9N9X9W)
**~~View all trending →~~**
## **What buyers say about aquarium sponge**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**25%
*“This filter works great”*
**Value For Money**14%
*“great value for the money”*
**Size-Overall**13%
*“Fits good”*
**Quality-Overall**11%
*“Other than that, no complaints”*
**Advertised Vs Actual Product**9%
*“exactly what I was looking for”*
**Ease Of Cleaning**4%
*“It keeps the tank clean”*
**Durability**4%
*“durability good”*
**Ease Of Use**3%
*“easy to use”*
**Thickness**2%
*“It's the right thickness”*
**Assembly/Installation**2%
*“Easy to Install”*
### **What buyers complain about **
**Size-Overall**20%
*“as you can see in my photo it was far too short”*
**Quality-Overall**13%
*“Poor quality”*
**Filtration**10%
*“1 filter missing”*
**Thickness**6%
*“Not one inch thick”*
**Value For Money**4%
*“They are more expensive than basic filter pads”*
**Functionality-Overall**4%
*“This stuff does not work”*
**Water Resistance**4%
*“basically doesn't allow any water to get through”*
**Moist/Dry**2%
*“had to be soaked prior to use”*
**Ease Of Cleaning**2%
*“Dirty, dirty, dirty”*
**Hard Feel**2%
*“Way too rough”*
### **Top return reasons **
**Size-Overall**34%
**Filtration**19%
**Advertised Vs Actual Product**11%
**Thin**6%
**Thickness**6%
**Value For Money**5%
**Material Quality**4%
**Functionality-Overall**3%
**Compatibility-Overall**2%
**Defective Material/Parts**2%
## **Common questions**
- **Is aquarium sponge profitable to sell on Amazon United States?**
- The niche generates $318K/yr across 20 tracked products. 90-day search growth is +22.6%. Flapen's verdict: Worth a look (55/100).
- **How competitive is the aquarium sponge niche?**
- 8 brands and 21 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 94% of demand.
- **What do buyers complain about in aquarium sponge?**
- Top complaints mined from reviews: Size-Overall, Quality-Overall, Filtration. The return rate is 1.1%.
- **When does demand for aquarium sponge peak?**
- Demand peaks in May–Jun; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the aquarium sponge niche?**
- Listings span $2.56–$139.41; the average listing price is $37.43 (sweet spot $15–$100). The average incumbent carries 920 reviews — the moat a new listing must climb.
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