---
title: "Sponge Filter 5 Gallon — $156K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/sponge-filter-5-gallon"
last_updated: "2026-07-21T19:34:12.436Z"
locale: en
meta:
description: "Niche score 47/100 · $156K/yr market · 273K searches/yr · $10.93 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $156K/yr market · 273K searches/yr · $10.93 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Sponge Filter 5 Gallon — $156K/yr Amazon US Niche (2026) - Flapen"
---
# **sponge filter 5 gallon**
**Skip it**
Brand-locked demand (top 5 brands take 91% of clicks) — this niche doesn't clear our bar today.
Market size 33Growth 26Conversion 60Competition 65Returns 65Price range 49Avg price 41Brand share 23Review moat 49Quality gap 63
**Competition**
**Good****46%**
top-5 click share — leaders hold, buyers still browse
**Returns**
**Good****2.4%**
return rate — above 6% kills the launch gate
**Quality gap**
**Good****4.4★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****5.2%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Okay****1,625.64**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Okay****$5.91–$23.81**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Avg price**
**Okay****$10.93**
avg listing price — sweet spot $15–$100
**Market size**
**Okay****$156K**
$156K/yr · 273K searches
**Growth**
**Okay****+1.2%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****91%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, sponge filter 5 gallon is a $156K/yr Amazon United States market (273K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in May. Verdict: Skip it — 47/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **sponge filter 5 gallon market data**
- **Units sold / yr**
- **13K–15K**
- avg 250–500/product
- **Revenue / yr**
- **$137K–$164K**
- units × avg price
- **Launch success**
- **—**
- 0 of 2 new (360d)
- **Conversion rate**
- **5.2%**
- **Avg BSR**
- **#111**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **91%**
- **Out of stock**
- **3.0%**
- **Avg brand age**
- **48 months**
- **Avg seller age**
- **178 days**
## **Competition & brand share**
The top 5 products take 46% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▲rising
**Sellers**
**18**
**Top-5 brand share**
**91%**
Top 20: 100%
**Top-5 click share**
**46%**
Top 20: 86%
**Open market**
**7%**
- AQUANEAT41% - Pawfly27% - hygger14% - AQQA6% - Carefree Fish3% - DEGGOX2% - Open — no brand owns it (6 brands, 7%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +1.2% search growth over the last 90 days.
7K5KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/sponge-filter-5-gallon/trend)
## **Top sponge filter 5 gallon search terms**
- **sponge filter 5 gallon**56K/yr+1.3%4.7% conv. - **sponge filter 10 gallon**49K/yr+6.1%4.3% conv. - **sponge filter 10+ gallon**43K/yr+0.2%3.5% conv. - **small sponge filter**30K/yr+0.9%4.9% conv. - **mini sponge filter**17K/yr+4.3%4.2% conv. - **nano sponge filter**13K/yr+3.0%3.3% conv. - **10 gallon sponge filter**12K/yr+9.9%5.5% conv. - **sponge filter 5+ gallon**11K/yr+2.2%4.9% conv. - **5 gallon sponge filter**10K/yr-3.3%4.3% conv. - **sponge filter for 10 gallon tank**8K/yr-9.3%3.5% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/sponge-filter-5-gallon/search-terms)
## **Top sponge filter 5 gallon 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%4%$6K8%$13K12%$19K16%$25K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 33 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**AQUANEAT 3 Pack Aquarium Bio Sponge Filter Breeding Fry Betta Shrimp Nano Fish Tank (Small up to 10Gal)**AQUANEAT**$6.55**4.7★3,351 rev](https://www.amazon.com/dp/B078HDL21V) [2**Pawfly 3 Pack Aquarium Sponge Filter Quiet Betta Fry Shrimp and Small Fish Foam Filter for Tiny Fish Tank up to 10 Gallon**Pawfly**$6.11**4.6★2,249 rev](https://www.amazon.com/dp/B098SGW6QS) [3**AQUANEAT Aquarium Air Powered Sponge Filter Fish Tank Bio Bubble Filter with Airline Tubing Valves Suction Cup(up to 10Gal)**AQUANEAT**$6.33**4.7★3,143 rev](https://www.amazon.com/dp/B08F79B7MS) [4**AQUANEAT Aquarium Bio Sponge Filter Breeding Fry Betta Shrimp Nano Fish Tank (Small up to 10Gal)**AQUANEAT**$5.92**4.7★9,197 rev](https://www.amazon.com/dp/B06Y5Z6V8Z) [5**Pawfly Aquarium Sponge Filter Mini Sponge Filter Kit with Airline Tubing and Control Valve for Small Fish Tank up to 3 Gallon**Pawfly**$5.92**4.5★1,964 rev](https://www.amazon.com/dp/B09BND5YQ6)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Carefree Fish Aquarium Small Sponge Bubble Filter with Fish Poops Collector Quiet for 3~8Gal Fish Tank for Saltwater and Freshwater(Not Include Air Pump)**Carefree Fish**$9.82**30 rev3mo ago](https://www.amazon.com/dp/B0GC7835FY) [**hygger Self-Sinking Sponge Filter for 330 Gallon Aquarium Air Powered Foam Filter for Freshwater & Saltwater Tanks Betta & Shrimp Safe**hygger**$11.79**27 rev7mo ago](https://www.amazon.com/dp/B0G3P7Q9DP) [**UNEAK Extra Small Aquarium Sponge Filter Fish Tank Silent Filteration Breeding Fry Betta Shrimp Nano Tank Accessories Air Stone 4-inch Airline Tubing up to 5 Gallon**UNEAK**$8.56**85 rev1y ago](https://www.amazon.com/dp/B0DX6RC41M) [**UPETTOOLS Mini Aquarium Sponge Filter Small Fish Tank Filter Submersible Fish Filter Built-in Air Bubble Stone and Bio Balls for Fish Tanks up to 5 Gallon (Air Pump Not Included)**UPETTOOLS**$8.50**229 rev2y ago](https://www.amazon.com/dp/B0D4TGZCP6) [**Pawfly Mini Aquarium Sponge Filter Small Fish Tank Internal Filter with Foam and Air Stone Submersible Bio Sponge Filter for Fish Tanks up to 5 Gallon (Air Pump & Airline Tubing Not Included)**Pawfly**$7.49**541 rev2y ago](https://www.amazon.com/dp/B0CY5FK5VH)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Carefree Fish Aquarium Small Sponge Bubble Filter with Fish Poops Collector Quiet for 3~8Gal Fish Tank for Saltwater and Freshwater(Not Include Air Pump)**Carefree Fish**$9.82**4.0★**▲ 233%**](https://www.amazon.com/dp/B0GC7835FY) [**ALEGI Aquarium Bio Sponge Filter with Ceramic Media for Clear and Quiet Aquariums for Betta Fry Shrimp Tiny Fish Tank (10-40 Gallon 2 Pack)**ALEGI**$14.17**4.5★**▲ 136%**](https://www.amazon.com/dp/B0BZTQ9D2K) [**hygger Self-Sinking Sponge Filter for 330 Gallon Aquarium Air Powered Foam Filter for Freshwater & Saltwater Tanks Betta & Shrimp Safe**hygger**$11.79**4.5★**▲ 94%**](https://www.amazon.com/dp/B0G3P7Q9DP) [**AQUANEAT Aquarium Air Powered Sponge Filter Fish Tank Bio Bubble Filter with Airline Tubing Valves Suction Cup(up to 10Gal)**AQUANEAT**$6.33**4.7★**▲ 45%**](https://www.amazon.com/dp/B08F79B7MS) [**myfole Mini Aquarium Filter Air Driven Sponge Filter for Small Fish Tank 0.5-5 Gallon**myfole**$7.89**4.3★**▲ 45%**](https://www.amazon.com/dp/B0BY3V4PWM)
**~~View all trending →~~**
## **What buyers say about sponge filter 5 gallon**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**33%
*“Decent Filter”*
**Quality-Overall**9%
*“Good Quality”*
**Value For Money**8%
*“Good deal”*
**Size-Overall**7%
*“Its a very snug fit”*
**Ease Of Cleaning**6%
*“It cleans well”*
**Advertised Vs Actual Product**5%
*“Exactly as advertised”*
**Ease Of Use**3%
*“Easy to use”*
**Water Flow**3%
*“Keeps the water clean and clear”*
**Spray/Flow**2%
*“Gentle flow and very quiet”*
**Durability**2%
*“- product is durable”*
### **What buyers complain about **
**Durability**19%
*“Broken”*
**Size-Overall**16%
*“Short one”*
**Filtration**13%
*“Not filtering”*
**Quality-Overall**5%
*“Very poor quality sponge”*
**Functionality-Overall**5%
*“DOESN'T WORK”*
**Leak-Proof**4%
*“Water leak”*
**Ease Of Cleaning**4%
*“not sure of cleaning capabilities”*
**Instructions/User Manual/Troubleshooting**2%
*“No Instructions”*
**Water Flow**1%
*“Does not pull water”*
**Advertised Vs Actual Product**1%
*“False advertising”*
### **Top return reasons **
**Size-Overall**50%
**Filtration**21%
**Functionality-Overall**6%
**Advertised Vs Actual Product**6%
**Defective Material/Parts**4%
**Value For Money**2%
**Compatibility-Overall**2%
**Durability**2%
**Product Condition**1%
**Assembly/Installation**1%
## **Common questions**
- **Is sponge filter 5 gallon profitable to sell on Amazon United States?**
- The niche generates $156K/yr across 33 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is +1.2%. Flapen's verdict: Skip it (47/100).
- **How competitive is the sponge filter 5 gallon niche?**
- 12 brands and 18 sellers compete. The top 5 products take 46% of clicks and top 5 brands hold 91% of demand.
- **What do buyers complain about in sponge filter 5 gallon?**
- Top complaints mined from reviews: Durability, Size-Overall, Filtration. The return rate is 2.4%.
- **When does demand for sponge filter 5 gallon peak?**
- Demand peaks in May; the busiest month runs 1.7× the quietest.
- **What does it cost to enter the sponge filter 5 gallon niche?**
- Listings span $5.91–$23.81; the average listing price is $10.93 (sweet spot $15–$100). The average incumbent carries 1,626 reviews — the moat a new listing must climb.
## **Related niches in Pet Supplies**
- 73 [**phosphate test kit**](https://flapen.com/research/us/pet-supplies/phosphate-test-kit)$194K/yr+152.5%**Worth a look**- 73 [**flea repellent for dogs**](https://flapen.com/research/us/pet-supplies/flea-repellent-for-dogs)$1.7M/yr+136.7%**Launch it**- 73 [**kitten bottles for nursing**](https://flapen.com/research/us/pet-supplies/kitten-bottles-for-nursing)$457K/yr+166.2%**Worth a look**- 73 [**dog stake**](https://flapen.com/research/us/pet-supplies/dog-stake)$573K/yr+55.9%**Worth a look**- 73 [**bully sticks**](https://flapen.com/research/us/pet-supplies/bully-sticks)$12.4M/yr-6.9%**Worth a look**- 73 [**pet oral tartar remover spray**](https://flapen.com/research/us/pet-supplies/pet-oral-tartar-remover-spray)$100K/yr>1,000%**Worth a look**[**All Pet Supplies niches **](https://flapen.com/research/us/pet-supplies)