Skip to content

External Filter Aquarium

Fail

Demand is soft, at -20.3% this quarter, so External Filter Aquarium is a Fail.

Flapen Score
49
49 / 100
Ranks 458 of 875 Pet Supplies niches · −1 vs the category median of 50
Market size
£153K/yr151K searches / yr
90-day growth
-20.3%search demand this quarter
Competition
60%top-5 click share · 10 brands · 46 sellers

Flapen Score

External Filter Aquarium against its category

The dotted line is the Pet Supplies average. Past it, External Filter Aquarium is stronger. Inside it, weaker.

49Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The External Filter Aquarium market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for External Filter Aquarium 151K times last year and spent an estimated £153K. The top 5 brands take 87% of clicks. Flapen scores it 49 out of 100, a Fail.

01 · Demand

An estimated 1.9% of those searches ended in a purchase.

Shoppers searched for this 151K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 1.9% of those searches ended in a purchase. Searches in the last 90 days moved -20.3% against the 90 days before. Searches, conversion and average price together put the market at an estimated £153K a year.

Searches, last 12 months
151K
Growth, 90 days vs prior 90
-20.3%
Conversion, latest week
1.9%
Market size, estimated
£153Ka year
Peak month
February1.6× the quietest month
Top search term
external fish tank filter22K searches a year

02 · Price

A sale here is worth £53.40.

Listings sell for £53.40 on average, from £24.32 to £98.75. Amazon reports units sold in ranges. This niche sold 2K to 2K a year. The average listing sells 0 to 100 of them. At £53.40 that is £0 to £5K a year per listing.

Average price
£53.40inside the $15 to $100 sweet spot
Price range
£24.32–£98.75
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
2K–2K
Units per listing a year
0–100
Revenue per listing a year
£0–£5K
Returns
1.4%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is ads.

91% of listings pay for placement with sponsored ads. 77% ship with Prime. On an average day, 8.5% of listings are out of stock. The average listing ranks #115 within Fish & Aquatic Pets. It carries 943 reviews at 4.08 stars, so a new listing needs social proof before a better product.

Sponsored listings
91%
Prime listings
77%
Out of stock, average day
8.5%
Average rank
#115in Fish & Aquatic Pets
Average rating
4.08 starsAmazon United Kingdom average 4.36 stars
Average reviews
943per listing
Listings tracked
22

04 · Newcomers

0 of last year's 8 launches cleared the first-year sales bar.

8 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 76 months on average, so the names here are established.

Launched, last 12 months
8
Successful launches
0Amazon's first-year sales bar
Average brand age
76 months

Products

Top External Filter Aquarium 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 60% of clicks. Leaders hold, but buyers still shop past them.

£0£15K£31K£46K£61K1101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

10 falling

Sellers

46

Est. top-5 brand share

87%

Top 20: 100%

Est. top-5 click share

60%

Top 20: 98%

Open market

9%

  • allpondsolutions47%
  • Fluval16%
  • Fishnanny11%
  • AQQA7%
  • hygger6%
  • Hidom4%
  • Open — no brand owns it (4 brands, 9%)

Demand

External Filter Aquarium search demand

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

5K4KSpike '24Holiday '24Prime Day '25Spike '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.6×

Search terms

Top External Filter Aquarium search terms shoppers use

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

  • external fish tank filter22K/yr
  • external filter aquarium26K/yr
  • canister filter aquarium17K/yr
  • external aquarium filter17K/yr
  • canister filter11K/yr
  • aquarium external filter11K/yr
  • external filter10K/yr
  • aquarium filter external6K/yr
  • aquarium canister filter5K/yr
  • fish tank external filter6K/yr

Reviews and returns

What reviews say buyers love and hate about External Filter Aquarium

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

40%of positive reviews mention “Filtration”
11%of negative reviews mention “Filtration”
1.4%of orders come back
“Im very disappointed in this filter”
A buyer, on “Filtration”11% 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.

18 topics

NegativePositive

FAQ

Common External Filter Aquarium 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