---
title: "Aquarium Filter Sponge — $116K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/aquarium-filter-sponge"
last_updated: "2026-07-21T17:29:12.585Z"
locale: en
meta:
description: "Niche score 41/100 · $116K/yr market · 195K searches/yr · $8.55 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 41/100 · $116K/yr market · 195K searches/yr · $8.55 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Aquarium Filter Sponge — $116K/yr Amazon US Niche (2026) - Flapen"
---
# **aquarium filter sponge**
**Skip it**
Soft demand (-6.1% this quarter) — this niche doesn't clear our bar today.
Market size 27Growth 22Conversion 75Competition 35Returns 91Price range 39Avg price 24Brand share 25Review moat 50Quality gap 40
**Returns**
**Great****1.2%**
return rate — above 6% kills the launch gate
**Conversion**
**Good****6.9%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****1,535.5**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Price range**
**Okay****$4.24–$21.80**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Okay****64%**
top-5 click share — leaders hold, buyers still browse
**Market size**
**Okay****$116K**
$116K/yr · 195K searches
**Brand share**
**Okay****90%**
top-5 brand share — brands hold most of the demand
**Avg price**
**Bad****$8.55**
avg listing price — sweet spot $15–$100
**Growth**
**Bad****-6.1%**
90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, aquarium filter sponge is a $116K/yr Amazon United States market (195K searches/yr). The top 5 brands hold 90% of demand. Demand peaks in May. Verdict: Skip it — 41/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **aquarium filter sponge market data**
- **Units sold / yr**
- **13K–15K**
- avg 500–750/product
- **Revenue / yr**
- **$107K–$128K**
- units × avg price
- **Launch success**
- **—**
- 0 of 1 new (360d)
- **Conversion rate**
- **6.9%**
- **Avg BSR**
- **#122**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **40 months**
- **Avg seller age**
- **167 days**
## **Competition & brand share**
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**9 **▼falling
**Sellers**
**19**
**Top-5 brand share**
**90%**
Top 20: 100%
**Top-5 click share**
**64%**
Top 20: 100%
**Open market**
**7%**
- AQUANEAT59% - ALEGI17% - Pawfly5% - Fluval5% - HUYAYA4% - Borlech3% - Open — no brand owns it (3 brands, 7%)
## **Demand & seasonality**
Weekly Amazon search volume, last 57 weeks — -6.1% search growth over the last 90 days.
4K3KSpike '26 seasonJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: May · busiest ÷ quietest = 1.8×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/aquarium-filter-sponge/trend)
## **Top aquarium filter sponge search terms**
- **aquarium filter sponge**63K/yr-5.7%4.7% conv. - **filter sponge**26K/yr+3.8%5.2% conv. - **pre filter sponge**18K/yr+9.5%5.6% conv. - **fish tank filter sponge**14K/yr-2.2%3.8% conv. - **prefilter sponge**10K/yr+33.9%4.8% conv. - **filter sponges fish tank**14K/yr-27.7%4.9% conv. - **fish filter sponge**9K/yr+6.6%5.1% conv. - **pre filter sponge aquarium**7K/yr-21.2%6.3% conv. - **aquarium prefilter sponge**5K/yr-6.4%6.1% conv. - **prefilter sponge for aquarium**8K/yr-51.5%7.1% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/aquarium-filter-sponge/search-terms)
## **Top aquarium filter 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%$12K20%$23K30%$35K40%$46K101001K10K 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**AQUANEAT 6-Pack Pre-Filter Sponge for Aquarium Shrimp Fry Fish Tank Filter 0.8 Intake Replacement Foam Cover**AQUANEAT**$6.05**4.5★2,192 rev](https://www.amazon.com/dp/B0B5KW55YX) [2**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) [3**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) [4**Fluval Edge Pre-Filter Sponge Replacement Aquarium Filter Media A1387**Fluval**$4.24**4.6★4,925 rev](https://www.amazon.com/dp/B002LL32RY) [5**AQUANEAT 6-Pack Replacement Filter Sponge Pads Aquarium Foam Insert Compatible with AquaClear 50 Fish Tank Filter Media**AQUANEAT**$6.37**4.4★271 rev](https://www.amazon.com/dp/B0F2MH4ZHP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**AQUANEAT Aquarium Filter Sponge 8-Layer Filter Media Pad Cut-to-Size Foam Floss for Fish Tank Sump Pond (16 x 12 x 0.6)**AQUANEAT**$5.73**79 rev11mo ago](https://www.amazon.com/dp/B0FLT6W764) [**hygger Aquarium Sponge Filter Pad Filter Media Foam Sponges Cut-to-Size Open Cell Foam Sheet for Fish Tanks and Ponds S (4 Pack 5.9 * 3.9 * 1 inch)**hygger**$9.31**72 rev1y ago](https://www.amazon.com/dp/B0FFMPX5K6) [**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) [**AQUANEAT 6-Pack Replacement Filter Sponge Pads Aquarium Foam Insert Compatible with AquaClear 50 Fish Tank Filter Media**AQUANEAT**$6.37**271 rev1y ago](https://www.amazon.com/dp/B0F2MH4ZHP) [**Borlech 8-Layer Fast-Acting Aquarium Filter Pad - Cut-to-Size Aquarium Floss Media for Fish Tank Pond Sump - Fast Water Polishing in Hours (15.75x11.81x0.6 1 Pack)**Borlech**$7.16**1,048 rev1y ago](https://www.amazon.com/dp/B0DP9KKQY1)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**AQUANEAT Aquarium Filter Sponge 8-Layer Filter Media Pad Cut-to-Size Foam Floss for Fish Tank Sump Pond (16 x 12 x 0.6)**AQUANEAT**$5.73**4.4★**▲ 54%**](https://www.amazon.com/dp/B0FLT6W764) [**AQUANEAT 6-Pack Pre-Filter Sponge for Aquarium Shrimp Fry Fish Tank Filter 1 Intake Replacement Foam Cover**AQUANEAT**$14.84**4.5★**▲ 46%**](https://www.amazon.com/dp/B0B5KSSCBY) [**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★**▲ 30%**](https://www.amazon.com/dp/B0BZNNH2B7) [**AQUANEAT 12-Pack Pre-Filter Sponge for Aquarium Shrimp Fry Fish Tank Filter Intake 0.6 Inch Replacement Foam Cover**AQUANEAT**$7.86**4.5★**▲ 22%**](https://www.amazon.com/dp/B0D9CN5N95) [**ALEGI Aquarium Sponge Filter Pad Bio Filter Media Foam Sponges Cut-to-Size Foam for Fish Tank (20x20x1 (20PPI))**ALEGI**$9.03**4.7★**▲ 16%**](https://www.amazon.com/dp/B0C99S8J7D)
**~~View all trending →~~**
## **What buyers say about aquarium filter sponge**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**29%
*“Filter is good quality”*
**Size-Overall**14%
*“fits like a glove”*
**Quality-Overall**13%
*“I think they are well made”*
**Value For Money**11%
*“Good deal”*
**Ease Of Cleaning**7%
*“It keeps the tank clean”*
**Advertised Vs Actual Product**7%
*“Just what I needed”*
**Durability**4%
*“Holds Up Well”*
**Ease Of Use**3%
*“Very easy to use”*
**Water Flow**2%
*“Great Product for Clearer Water”*
**Spray/Flow**1%
*“Worked great to slow the water flow on the aquarium pump”*
### **What buyers complain about **
**Thickness**17%
*“Material is too thin”*
**Size-Overall**15%
*“Too small”*
**Filtration**9%
*“Filter dimensions inaccurate”*
**Advertised Vs Actual Product**8%
*“Not as advertised”*
**Quality-Overall**8%
*“its lower quality”*
**Value For Money**4%
*“Too expensive”*
**Functionality-Overall**3%
*“Does not work”*
**Thin**3%
*“Way too thin”*
**Durability**2%
*“Terrible was destroyed in 1 day”*
**Material Quality**2%
*“cheaper material”*
### **Top return reasons **
**Size-Overall**49%
**Filtration**15%
**Advertised Vs Actual Product**11%
**Thin**5%
**Thickness**3%
**Compatibility-Overall**3%
**Functionality-Overall**3%
**Material Quality**3%
**Value For Money**3%
**Defective Material/Parts**1%
## **Common questions**
- **Is aquarium filter sponge profitable to sell on Amazon United States?**
- The niche generates $116K/yr across 20 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -6.1%. Flapen's verdict: Skip it (41/100).
- **How competitive is the aquarium filter sponge niche?**
- 9 brands and 19 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 90% of demand.
- **What do buyers complain about in aquarium filter sponge?**
- Top complaints mined from reviews: Thickness, Size-Overall, Filtration. The return rate is 1.2%.
- **When does demand for aquarium filter sponge peak?**
- Demand peaks in May; the busiest month runs 1.8× the quietest.
- **What does it cost to enter the aquarium filter sponge niche?**
- Listings span $4.24–$21.80; the average listing price is $8.55 (sweet spot $15–$100). The average incumbent carries 1,536 reviews — the moat a new listing must climb.
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