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Fish Tank Filter Cartridges

Maybe

An estimated 0.8% of orders come back. But demand is soft, at -27.2% this quarter, so Fish Tank Filter Cartridges is a Maybe.

Flapen Score
52
52 / 100
Top 38% of 875 Pet Supplies niches · +2 vs the category median of 50
Market size
£75K/yr61K searches / yr
90-day growth
-27.2%search demand this quarter
Competition
45%top-5 click share · 18 brands · 68 sellers

Flapen Score

Fish Tank Filter Cartridges against its category

The dotted line is the Pet Supplies average. Past it, Fish Tank Filter Cartridges is stronger. Inside it, weaker.

52Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Fish Tank Filter Cartridges market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Fish Tank Filter Cartridges 61K times last year and spent an estimated £75K. The top 5 brands take 84% of clicks. Demand peaks in Feb. Flapen scores it 52 out of 100, a Maybe.

01 · Demand

An estimated 11.1% of those searches ended in a purchase.

Shoppers searched for this 61K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 11.1% of those searches ended in a purchase. Searches in the last 90 days moved -27.2% against the 90 days before. Searches, conversion and average price together put the market at an estimated £75K a year.

Searches, last 12 months
61K
Growth, 90 days vs prior 90
-27.2%
Conversion, latest week
11.1%
Market size, estimated
£75Ka year
Peak month
February1.6× the quietest month
Top search term
ciano fish tank filter cartridges15K searches a year

02 · Price

A sale here is worth £10.91.

Listings sell for £10.91 on average, from £2.73 to £28.59. Amazon reports units sold in ranges. This niche sold 5K to 6K a year. The average listing sells 100 to 250 of them. At £10.91 that is £1K to £3K a year per listing.

Average price
£10.91under the $15 to $100 sweet spot
Price range
£2.73–£28.59
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
5K–6K
Units per listing a year
100–250
Revenue per listing a year
£1K–£3K
Returns
0.8%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is low.

51% of listings pay for placement with sponsored ads. 74% ship with Prime. On an average day, 2.2% of listings are out of stock. The average listing ranks #132 within Fish & Aquatic Pets. It carries 841 reviews at 4.31 stars, so a new listing needs social proof before a better product.

Sponsored listings
51%
Prime listings
74%
Out of stock, average day
2.2%
Average rank
#132in Fish & Aquatic Pets
Average rating
4.31 starsAmazon United Kingdom average 4.36 stars
Average reviews
841per listing
Listings tracked
39

04 · Newcomers

0 of last year's 5 launches cleared the first-year sales bar.

5 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 35 months on average, so a newcomer is not facing entrenched names.

Launched, last 12 months
5
Successful launches
0Amazon's first-year sales bar
Average brand age
35 months

Products

Top Fish Tank Filter Cartridges 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 29, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 45% of clicks. Leaders hold, but buyers still shop past them.

£0£2K£4K£7K£9K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

18 rising

Sellers

68

Est. top-5 brand share

84%

Top 20: 100%

Est. top-5 click share

45%

Top 20: 85%

Open market

13%

  • Ciano36%
  • Finest-Filters23%
  • Interpet11%
  • Tetra9%
  • Marina5%
  • CWA2%
  • Open — no brand owns it (12 brands, 13%)

Demand

Fish Tank Filter Cartridges search demand

Weekly searches over the year, seasonality beneath. Pick a range.

2K1KSpike '24Black Friday '24Spike '26SepDecMarJunAugNovMarMay

Peak months: Feb · busiest ÷ quietest = 1.6×

Search terms

Top Fish Tank Filter Cartridges search terms shoppers use

The exact words shoppers type, with estimated yearly volume, growth, and conversion.

  • ciano fish tank filter cartridges15K/yr
  • fish tank filter cartridges16K/yr
  • ciano filter7K/yr
  • tetra filter6K/yr
  • interpet cf1 filter 3 month service kit5K/yr
  • ciano4K/yr
  • cf1 filter service pack 3 month4K/yr
  • fish filter cartridges2K/yr
  • tetra easy crystal filter 250/3002K/yr

Reviews and returns

What reviews say buyers love and hate about Fish Tank Filter Cartridges

We read the reviews and the return reasons for every product selling here.

23%of positive reviews mention “Value For Money”
18%of negative reviews mention “Filtration”
0.8%of orders come back
“Worst filter I have ever seen”
A buyer, on “Filtration”18% of negative reviews mention the same topic

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.

19 topics

NegativePositive

FAQ

Common Fish Tank Filter Cartridges 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