---
title: "Submersible Filter — $51K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/submersible-filter"
last_updated: "2026-07-22T21:29:54.511Z"
locale: en
meta:
description: "Niche score 47/100 · $51K/yr market · 30K searches/yr · $25.70 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 47/100 · $51K/yr market · 30K searches/yr · $25.70 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Submersible Filter — $51K/yr Amazon US Niche (2026) - Flapen"
---
# **submersible filter**
**Skip it**
A small market ($51K/yr) — this niche doesn't clear our bar today.
Market size 13Growth 22Conversion 73Competition 48Returns 42Price range 84Avg price 95Brand share 40Review moat 41Quality gap 76
**Avg price**
**Incredible****$25.70**
avg listing price — sweet spot $15–$100
**Price range**
**Great****$6.20–$72.88**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Conversion**
**Good****6.7%**
search→purchase rate — share of searches ending in a sale
**Competition**
**Okay****56%**
top-5 click share — leaders hold, buyers still browse
**Returns**
**Okay****3.9%**
return rate — above 6% kills the launch gate
**Review moat**
**Okay****2,350.83**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****81%**
top-5 brand share — brands hold most of the demand
**Growth**
**Bad****-6.6%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$51K**
$51K/yr · 30K searches
According to Flapen's Amazon United States niche tracking, submersible filter is a $51K/yr Amazon United States market (30K searches/yr). The top 5 brands hold 81% of demand. Verdict: Skip it — 47/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **submersible filter market data**
- **Units sold / yr**
- **2K–3K**
- avg 100–250/product
- **Revenue / yr**
- **$51K–$64K**
- units × avg price
- **Launch success**
- **29%**
- 2 of 7 new (360d)
- **Conversion rate**
- **6.7%**
- **Avg BSR**
- **#391**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **70%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **52 months**
- **Avg seller age**
- **169 days**
## **Competition & brand share**
The top 5 products take 56% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**14 **▲rising
**Sellers**
**33**
**Top-5 brand share**
**81%**
Top 20: 100%
**Top-5 click share**
**56%**
Top 20: 98%
**Open market**
**16%**
- Fluval59% - beaufan6% - TARARIUM6% - NICREW5% - AquaMiracle5% - Tetra4% - Open — no brand owns it (8 brands, 16%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -6.6% search growth over the last 90 days.
700500Black Friday '24Prime Day '25Black Friday '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.2×
[**Open Trend **](https://flapen.com/research/us/pet-supplies/submersible-filter/trend)
## **Top submersible filter search terms**
- **submersible filter**5K/yr+33.3%1.5% conv. - **submersible water filter**4K/yr+50.2%1.4% conv. - **fluval u4**5K/yr-13.9%5.8% conv. - **fluval u3**5K/yr-25.2%7.9% conv. - **fluval u3 filter replacement**5K/yr-41.3%10.9% conv. - **underwater filter**2K/yr+1.1%1.5% conv. - **fluval underwater filter**2K/yr-11.5%5.1% conv. - **fluval u3 filter**2K/yr-45.4%8.9% conv. [**All search terms **](https://flapen.com/research/us/pet-supplies/submersible-filter/search-terms)
## **Top submersible 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.
0%10%$5K20%$10K30%$15K40%$21K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 23 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Fluval U3 Underwater Filter Designed for Freshwater and Saltwater Aquariums Also Ideal for Terrariums and Turtle Tanks**Fluval**$35.81**4.0★2,139 rev](https://www.amazon.com/dp/B001TKZ51E) [2**Fluval U4 Underwater Filter Freshwater and Saltwater Aquarium Filter A480 Black**Fluval**$72.88**4.3★3,212 rev](https://www.amazon.com/dp/B001XRXY1G) [3**Fluval U3 Underwater Filter**Fluval**$8.21**4.6★1,304 rev](https://www.amazon.com/dp/B001XRR3E0) [4**beaufan 2 Set Aquarium Filter Media Compatible with Fluval U3 Underwater Filter Include 4 Carbon Foam Filter Pads 4 Sponge Filters and 1 Ceramic Ring Fit for Freshwater and Saltwater Aquariums**beaufan**$31.55**4.7★20 rev](https://www.amazon.com/dp/B0FLJXMP6D) [5**NICREW Aquarium Internal Filter Submersible Power Filter with Multiple Function for Fish Tanks 5-10 Gallon 53 GPH 5W**NICREW**$10.06**4.2★5,646 rev](https://www.amazon.com/dp/B08TLK2XXD)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Czarixa Aquarium Filter Bio Foam Pads Compatible with Fluval U3 Underwater Filter A487 Replacement Filter Foam for Fish Tank Filter Sponge Media for Freshwater and Saltwater Tanks 10 Pack**Czarixa**$12.84**2 rev5mo ago](https://www.amazon.com/dp/B0GJYHNRB3) [**COOSPIDER Pool Filter 600GPH with U-V Light for 75-1000 Gallon Swimming Pool Cold Plunge Tub Small Pond Submersible Cold Plunge Filter with 35W Pump for Water Clean & Clarity Wave Make Filtration**COOSPIDER**$59.48**17 rev6mo ago](https://www.amazon.com/dp/B0GGMJ6P43) [**SYSENCIAGA Aquarium Filter with UV 450GPH for 40-150 Gallon Tanks Submersible with Timer for Crystal Clear Water in Aquarium Pond Turtle Tank25W**SYSENCIAGA**$29.77**58 rev7mo ago](https://www.amazon.com/dp/B0G584M3WQ) [**Pangda 12 Pcs Carbon Filter Foam Pads and Foam Filters Compatible with U3 Range of Internal Underwater Sponge Aquarium Underwater Filter Accessories for Internal Replacement Aquarium Fish Tank**Pangda**$18.94**5 rev10mo ago](https://www.amazon.com/dp/B0FRNB6132) [**Threlaco 15 Pcs / 2 Set Underwater Filter Media Compatible with Fluval U3 Including 4 Filter Foam Pad 4 Poly/Carbon 500g Bio-Ring 4 Mesh Bags 2 Grease for Freshwater Saltwater Aquariums**Threlaco**$27.57**10 rev10mo ago](https://www.amazon.com/dp/B0FPQK2Q4H)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**COOSPIDER Pool Filter 600GPH with U-V Light for 75-1000 Gallon Swimming Pool Cold Plunge Tub Small Pond Submersible Cold Plunge Filter with 35W Pump for Water Clean & Clarity Wave Make Filtration**COOSPIDER**$59.48**3.9★**▲ 312%**](https://www.amazon.com/dp/B0GGMJ6P43) [**SYSENCIAGA Aquarium Filter with UV 450GPH for 40-150 Gallon Tanks Submersible with Timer for Crystal Clear Water in Aquarium Pond Turtle Tank25W**SYSENCIAGA**$29.77**4.1★**▲ 303%**](https://www.amazon.com/dp/B0G584M3WQ) [**Czarixa Aquarium Filter Bio Foam Pads Compatible with Fluval U3 Underwater Filter A487 Replacement Filter Foam for Fish Tank Filter Sponge Media for Freshwater and Saltwater Tanks 10 Pack**Czarixa**$12.84**4.0★**▲ 243%**](https://www.amazon.com/dp/B0GJYHNRB3) [**Tetra Whisper Internal Power Filter Medium Bio-Bag Filter Cartridges 3-Stage Filtration 5-10 gal**Tetra**$15.61**4.3★**▲ 233%**](https://www.amazon.com/dp/B0002DHYF4) [**Fluval U1 Underwater Filter Freshwater and Saltwater Aquarium Filter A465 Black**Fluval**$33.31**4.0★**▲ 196%**](https://www.amazon.com/dp/B0020K966M)
**~~View all trending →~~**
## **What buyers say about submersible filter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Filtration**32%
*“The filter works great”*
**Value For Money**9%
*“Great Price”*
**Quality-Overall**8%
*“Of very good quality”*
**Ease Of Cleaning**7%
*“easy to clean”*
**Advertised Vs Actual Product**6%
*“Was working just as advertised”*
**Water Flow**5%
*“provides the perfect amount of water movement”*
**Size-Overall**5%
*“Fits well in my tank”*
**Strength**4%
*“It is incredibly powerful for the price point”*
**Spray/Flow**4%
*“Great water flow”*
**Pet Friendly**2%
*“My turtle even likes it”*
### **What buyers complain about **
**Durability**25%
*“Breaks quickly”*
**Filtration**16%
*“Poor filtering”*
**Quality-Overall**6%
*“Build quality is very poor”*
**Functionality-Overall**6%
*“it does not run for long”*
**Size-Overall**6%
*“Big”*
**Value For Money**5%
*“It may be cheap”*
**Spray/Flow**4%
*“Almost has no flow”*
**Ease Of Cleaning**3%
*“clean just a pain that has to be cleaned so frequently”*
**Instructions/User Manual/Troubleshooting**3%
*“Thought maybe user error”*
**Strength**3%
*“it won't stay together”*
### **Top return reasons **
**Size-Overall**42%
**Filtration**27%
**Functionality-Overall**7%
**Advertised Vs Actual Product**4%
**Defective Material/Parts**3%
**Product Condition**3%
**Compatibility-Overall**2%
**Durability**2%
**Value For Money**2%
**Strength**2%
## **Common questions**
- **Is submersible filter profitable to sell on Amazon United States?**
- The niche generates $51K/yr across 23 tracked products. 2 of 7 products launched in the last 360 days are still selling. 90-day search growth is -6.6%. Flapen's verdict: Skip it (47/100).
- **How competitive is the submersible filter niche?**
- 14 brands and 33 sellers compete. The top 5 products take 56% of clicks and top 5 brands hold 81% of demand.
- **What do buyers complain about in submersible filter?**
- Top complaints mined from reviews: Durability, Filtration, Quality-Overall. The return rate is 3.9%.
- **When does demand for submersible filter peak?**
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- **What does it cost to enter the submersible filter niche?**
- Listings span $6.20–$72.88; the average listing price is $25.70 (sweet spot $15–$100). The average incumbent carries 2,351 reviews — the moat a new listing must climb.
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