aquarium filter
Worth a lookShows a $4.7M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size
Incredible$4.7M$4.7M/yr · 3.4M searches
Avg price
Incredible$30.25avg listing price — sweet spot $15–$100
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Competition
Good41%top-5 click share — leaders hold, buyers still browse
Conversion
Good4.6%search→purchase rate — share of searches ending in a sale
Brand share
Good72%top-5 brand share — brands hold most of the demand
Returns
Good2.8%return rate — above 6% kills the launch gate
Price range
Okay$6.37–$211.38cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Bad8,260.34avg incumbent reviews — the moat a new listing must climb
Growth
Bad-6.2%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United States niche tracking, aquarium filter is a $4.7M/yr Amazon United States market (3.4M searches/yr). The top 5 brands hold 72% of demand. Verdict: Worth a look — 61/100.
Data updated Jul 17, 2026 · scored weekly · How we score niches
aquarium filter market data
- Units sold / yr
- 125K–150K
- avg 2,000–2,500/product
- Revenue / yr
- $3.8M–$4.5M
- units × avg price
- Launch success
- 100%
- 8 of 8 new (360d)
- Conversion rate
- 4.6%
- Avg BSR
- #34
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 75%
- Out of stock
- 1.3%
- Avg brand age
- 48 months
- Avg seller age
- 133 days
Competition & brand share
The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.Brands
23 falling
Sellers
82
Top-5 brand share
72%
Top 20: 98%
Top-5 click share
41%
Top 20: 76%
Open market
24%
- Tetra46%
- MarineLand9%
- NICREW7%
- DaToo5%
- QiQiWader4%
- PONDFORSE4%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -6.2% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Top aquarium filter search terms
- aquarium filter958K/yr
- fish tank filters620K/yr
- fish tank filter331K/yr
- fish filter168K/yr
- 10 gallon fish tank filter134K/yr
- 20 gallon fish tank filter105K/yr
- aquarium filters117K/yr
- filter for fish tank104K/yr
- small fish tank filter93K/yr
- filtro para pecera84K/yr
Top aquarium 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 44 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Tetra Whisper IQ Power Filter 20 Gallons 130 GPH with Stay Clean Technology
Tetra$21.184.2★13,787 rev
Tetra Whisper Internal Power Filter Medium Bio-Bag Filter Cartridges 3-Stage Filtration 5-10 gal
Tetra$15.614.3★22,392 rev
NICREW Slim Aquarium Filter Quiet Fish Tank HOB Filters for up to 5 Gallon Aquariums Adjustable Flow 42 GPH 3W
NICREW$12.344.1★2,763 rev
Marineland Bio-Wheel Penguin 350 GPH Power Aquarium Filter Ultra-Quiet Hang-On-Back Fish Tank Filter with Multi-Stage Filtration for Aquariums Up to 60 Gallons
MarineLand$43.624.3★41,200 rev
Marineland Bio-Wheel Penguin 200 GPH Power Aquarium Filter Ultra-Quiet Hang-On-Back Fish Tank Filter with Multi-Stage Filtration for Aquariums Up to 40 Gallons
MarineLand$37.914.3★41,200 rev
Newest
by launch date
QiQiWader Fish Tank Filter 10-40 Gallon Fish Tank Filter 6W 130GPH Equipped with Adjustable Aeration Function.
QiQiWader$16.1851 rev
AQUASMITH Hang on Back Aquarium Filter Ultra-Quiet Small Canister Filter Multi-Layered Filtration Bottom Anti-Dry Burn Motor Extra-Large Filter (92GPHfor 5-20 Gallon)
AQUASMITH$39.59105 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
QiQiWader Small Aquarium Filter Fish Tank Filter Suitable for 3-10 Gallon Fish Tanks 3W 80GPH with Two Modes Switching Function.
QiQiWader$16.8098 rev
PONDFORSE Canister Filter External Aquarium Filter Ultra-Quiet Water Circulation Cleaning Machine with Media for Fish Tanks and Aquariums
PONDFORSE$70.921,539 rev
Trending
90-day click momentumQiQiWader Fish Tank Filter 10-40 Gallon Fish Tank Filter 6W 130GPH Equipped with Adjustable Aeration Function.
QiQiWader$16.183.8★
AQUASMITH Hang on Back Aquarium Filter Ultra-Quiet Small Canister Filter Multi-Layered Filtration Bottom Anti-Dry Burn Motor Extra-Large Filter (92GPHfor 5-20 Gallon)
AQUASMITH$39.593.9★
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★
265 GPH 4-in-1 aquarium filter 20-80 gallon fish tank filters Filtration and Oxygenation filter for fish tank with biochemical cotton ceramic beads Multi-functional turtle tank filter(15 W)
lounginglife$19.984.4★
Large Hang on Back Aquarium Filter 264GPH for 20-75 Gal Fish Tank w/ U-V Light Surface Skimmer 13-Stage Green Killing Deodorization Machine Saltwater Freshwater Crystal Clear Suspension Oxygen
TARARIUM$61.053.8★
What buyers say about aquarium filter
What buyers praise and complain about, mined from review topics.What buyers love
“Great filtration system”
“Cost effective”
“Excellent product”
“Easy to clean”
“Fit as expected”
“Work as advertised”
“The water flows smoothly”
“Water flows clean”
“Ease of use”
“power is strong”
What buyers complain about
“Comes apart”
“Does not filter at all”
“Get something higher quality”
“it doesnt work very well”
“Leaked”
“it's small”
“The water flow is extremely weak”
“What too complicated to clean”
“I'm out the 25.00 it cost”
“Instructions poorly written”
Top return reasons
Common questions
- Is aquarium filter profitable to sell on Amazon United States?
- The niche generates $4.7M/yr across 44 tracked products. 8 of 8 products launched in the last 360 days are still selling. 90-day search growth is -6.2%. Flapen's verdict: Worth a look (61/100).
- How competitive is the aquarium filter niche?
- 23 brands and 82 sellers compete. The top 5 products take 41% of clicks and top 5 brands hold 72% of demand.
- What do buyers complain about in aquarium filter?
- Top complaints mined from reviews: Durability, Filtration, Quality-Overall. The return rate is 2.8%.
- When does demand for aquarium filter peak?
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- What does it cost to enter the aquarium filter niche?
- Listings span $6.37–$211.38; the average listing price is $30.25 (sweet spot $15–$100). The average incumbent carries 8,260 reviews — the moat a new listing must climb.