Fish Tank Filter Cartridge
MaybeAn estimated 1.8% of orders come back. But demand is soft, at -2.7% this quarter, so Fish Tank Filter Cartridge is a Maybe.
- Flapen Score
- 55 / 100Top 30% of 3,978 Pet Supplies niches · +4 vs the category median of 5155
- Market size
- $189K/yr238K searches / yr
- 90-day growth
- -2.7%search demand this quarter
- Competition
- 40%top-5 click share · 25 brands · 94 sellers
Flapen Score
Fish Tank Filter Cartridge against its category
The dotted line is the Pet Supplies average. Past it, Fish Tank Filter Cartridge is stronger. Inside it, weaker.
Market
The Fish Tank Filter Cartridge market on Amazon at a glance
Shoppers on Amazon United States searched for Fish Tank Filter Cartridge 238K times last year and spent an estimated $189K. The top 5 brands take 70% of clicks. Demand peaks in Sep–Oct–Nov. Flapen scores it 55 out of 100, a Maybe.
01 · Demand
An estimated 6.2% of those searches ended in a purchase.
Shoppers searched for this 238K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 6.2% of those searches ended in a purchase. Searches in the last 90 days moved -2.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated $189K a year.
- Searches, last 12 months
- 238K
- Growth, 90 days vs prior 90
- -2.7%
- Conversion, latest week
- 6.2%
- Market size, estimated
- $189Ka year
- Peak month
- October3.7× the quietest month
- Top search term
- aquarium filter cartridge22K searches a year
02 · Price
A sale here is worth $12.92.
Listings sell for $12.92 on average, from $6.37 to $33.92. Amazon reports units sold in ranges. This niche sold 15K to 20K a year. The average listing sells 250 to 500 of them. At $12.92 that is $3K to $6K a year per listing.
- Average price
- $12.92under the $15 to $100 sweet spot
- Price range
- $6.37–$33.92
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 15K–20K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $3K–$6K
- Returns
- 1.8%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
72% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.7% of listings are out of stock. The average listing ranks #54 within Fish & Aquatic Pets. It carries 6,267 reviews at 4.38 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 72%
- Prime listings
- 100%
- Out of stock, average day
- 0.7%
- Average rank
- #54in Fish & Aquatic Pets
- Average rating
- 4.38 starsAmazon United States average 4.42 stars
- Average reviews
- 6,267per listing
- Listings tracked
- 50
04 · Newcomers
1 of last year's 6 launches cleared the first-year sales bar.
6 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 53 months on average, so the names here are settling in.
- Launched, last 12 months
- 6
- Successful launches
- 1Amazon's first-year sales bar
- Average brand age
- 53 months
Products
Top Fish Tank Filter Cartridge products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 17, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Tetra Whisper Bio-Bag Medium Filter Cartridges for Aquariums 3 Count Ready to Use Fits Tetra Whisper Fish Tank Filters 5-10 Gal PF-10 IQ 10
- Price
- $6.37
- Rating
- 4.7/5
- Reviews
- 28,155
- Age
- 22y ago

Tetra Whisper 4i Internal Power Filter Filtration for Aquariums Between 1 and 4 Gallons
- Price
- $12.35
- Rating
- 4.3/5
- Reviews
- 22,392
- Age
- 7y ago

NICREW Slim Aquarium Filter Quiet Fish Tank HOB Filters for up to 5 Gallon Aquariums Adjustable Flow 42 GPH 3W
- Price
- $12.34
- Rating
- 4.1/5
- Reviews
- 2,763
- Age
- 2y ago

HiTauing 8 Pack EF-S Filter Cartridges for EF-S Element and BF5 BETTAFLO
- Price
- $8.69
- Rating
- 4.6/5
- Reviews
- 3,205
- Age
- 3y ago

DaToo Aquarium Power Filter In-Tank Ultra Silent Small Fish Tank Filter 3W For Aquarium 1 to 10 Gallon Tank 1 Yr Warranty
- Price
- $7.75
- Rating
- 4.0/5
- Reviews
- 3,198
- Age
- 8y ago
Trending
estimated 90-day click momentum
12-Pack EF-S Replacement Filter Cartridges for BF5 BettaFlo Aquarium Professional Triple Filtration to Keep Water Crystal Clear & Fish Healthy High-Density Activated Carbon Refills for Fish Tank
- Price
- $7.24
- Rating
- 4.1/5
- Reviews
- 75
- Age
- 5mo ago

Novique HOB Slim Aquarium Filter for Up to 5 Gallon Tank Ultra-Quiet Fish Tank Power Filter Flow Adjustable Suitable for Saltwater and Freshwater 42 GPH 3W
- Price
- $8.96
- Rating
- 3.9/5
- Reviews
- 119
- Age
- 11mo ago

Tetra Whisper Internal Power Filter Medium Bio-Bag Filter Cartridges 3-Stage Filtration 5-10 gal
- Price
- $15.61
- Rating
- 4.3/5
- Reviews
- 22,392
- Age
- 22y ago

Zuqqony 15 Pack PF-S Filter Cartridges Compatible with Silenstream PF10 Power Filters Remplacement Aquarium Carbon Cartridge with Zeolite
- Price
- $13.95
- Rating
- 4.5/5
- Reviews
- 1,406
- Age
- 2y ago

HiTauing 15 Packs PF-L Carbon Cartridges for PF20 PF30 PF40 and PF75 Power Filters
- Price
- $18.20
- Rating
- 4.6/5
- Reviews
- 2,529
- Age
- 3y ago
Newest
by launch date
12-Pack EF-S Replacement Filter Cartridges for BF5 BettaFlo Aquarium Professional Triple Filtration to Keep Water Crystal Clear & Fish Healthy High-Density Activated Carbon Refills for Fish Tank
- Price
- $7.24
- Rating
- 4.1/5
- Reviews
- 75
- Age
- 5mo ago

Novique HOB Slim Aquarium Filter for Up to 5 Gallon Tank Ultra-Quiet Fish Tank Power Filter Flow Adjustable Suitable for Saltwater and Freshwater 42 GPH 3W
- Price
- $8.96
- Rating
- 3.9/5
- Reviews
- 119
- Age
- 11mo ago

Zuqqony 8 Pack Filter Cartridges for Filter Replacement Filter Cartridges for Top Fin EF-S Element and BF5 BETTAFLO
- Price
- $8.77
- Rating
- 4.6/5
- Reviews
- 523
- Age
- 2y ago

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)
- Price
- $7.49
- Rating
- 4.2/5
- Reviews
- 541
- Age
- 2y ago

xbbwmrs 8 Count Medium Filter Cartridges Compatible with Tetra Whisper Bio-Bag Filters Medium Replacement Filter Cartridges for Whisper ReptoFilter and 10i IQ10 PF10 Power Filters -Ready to Use
- Price
- $19.95
- Rating
- 4.7/5
- Reviews
- 553
- Age
- 2y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 40% of clicks, no more. An open shelf where new products get seen.
Brands
25 flat
Sellers
94
Est. top-5 brand share
70%
Top 20: 97%
Est. top-5 click share
40%
Top 20: 75%
Open market
24%
- Tetra37%
- NICREW10%
- Aqueon8%
- HiTauing8%
- Zuqqony7%
- DaToo6%
Demand
Fish Tank Filter Cartridge search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Sep, Oct, Nov · busiest ÷ quietest = 3.7×
Search terms
Top Fish Tank Filter Cartridge search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- aquarium filter cartridge22K/yr
- filter cartridge17K/yr
- betta fish filter18K/yr
- fish tank filter cartridge21K/yr
- small tank filter17K/yr
- betta tank filter14K/yr
- beta fish tank filter16K/yr
- beta fish filter11K/yr
- tetra whisper filter medium7K/yr
- filter cartridge fish tank12K/yr
Reviews and returns
What reviews say buyers love and hate about Fish Tank Filter Cartridge
We read the reviews and the return reasons for every product selling here.
“Breaks easily”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
16 topics
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Fish Tank Filter Cartridge questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









