submersible filter
Skip itA small market ($51K/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$25.70avg listing price — sweet spot $15–$100
Price range
Great$6.20–$72.88cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Conversion
Good6.7%search→purchase rate — share of searches ending in a sale
Competition
Okay56%top-5 click share — leaders hold, buyers still browse
Returns
Okay3.9%return rate — above 6% kills the launch gate
Review moat
Okay2,350.83avg incumbent reviews — the moat a new listing must climb
Brand share
Okay81%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
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.No pronounced peak months · busiest ÷ quietest = 1.2×
Top submersible filter search terms
- submersible filter5K/yr
- submersible water filter4K/yr
- fluval u45K/yr
- fluval u35K/yr
- fluval u3 filter replacement5K/yr
- underwater filter2K/yr
- fluval underwater filter2K/yr
- fluval u3 filter2K/yr
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.
All 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Fluval U3 Underwater Filter Designed for Freshwater and Saltwater Aquariums Also Ideal for Terrariums and Turtle Tanks
Fluval$35.814.0★2,139 rev
Fluval U4 Underwater Filter Freshwater and Saltwater Aquarium Filter A480 Black
Fluval$72.884.3★3,212 rev
Fluval U3 Underwater Filter
Fluval$8.214.6★1,304 rev
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$31.554.7★20 rev
NICREW Aquarium Internal Filter Submersible Power Filter with Multiple Function for Fish Tanks 5-10 Gallon 53 GPH 5W
NICREW$10.064.2★5,646 rev
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$12.842 rev
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$59.4817 rev
SYSENCIAGA Aquarium Filter with UV 450GPH for 40-150 Gallon Tanks Submersible with Timer for Crystal Clear Water in Aquarium Pond Turtle Tank25W
SYSENCIAGA$29.7758 rev
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$18.945 rev
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$27.5710 rev
Trending
90-day click momentumCOOSPIDER 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$59.483.9★
SYSENCIAGA Aquarium Filter with UV 450GPH for 40-150 Gallon Tanks Submersible with Timer for Crystal Clear Water in Aquarium Pond Turtle Tank25W
SYSENCIAGA$29.774.1★
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$12.844.0★
Tetra Whisper Internal Power Filter Medium Bio-Bag Filter Cartridges 3-Stage Filtration 5-10 gal
Tetra$15.614.3★
Fluval U1 Underwater Filter Freshwater and Saltwater Aquarium Filter A465 Black
Fluval$33.314.0★
What buyers say about submersible filter
What buyers praise and complain about, mined from review topics.What buyers love
“The filter works great”
“Great Price”
“Of very good quality”
“easy to clean”
“Was working just as advertised”
“provides the perfect amount of water movement”
“Fits well in my tank”
“It is incredibly powerful for the price point”
“Great water flow”
“My turtle even likes it”
What buyers complain about
“Breaks quickly”
“Poor filtering”
“Build quality is very poor”
“it does not run for long”
“Big”
“It may be cheap”
“Almost has no flow”
“clean just a pain that has to be cleaned so frequently”
“Thought maybe user error”
“it won't stay together”
Top return reasons
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.