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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

1.9% of searches ended in a purchase last week.

Shoppers searched for this 151K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. In the latest week, 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

Amazon counts 0 of last year's 8 launches as successful.

8 products launched here in the last 12 months. Amazon counts 0 of them as successful launches, new products that hit its first-year sales bar. 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

Every tracked product: its share of the shelf, its reviews, and its price.

Competition

Competition: brands, sellers & click share

The top 5 products take 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

Top-5 brand share

87%

Top 20: 100%

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 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

What buyers praise, what they complain about and why they send it back, from the reviews.

Complain

Filtration11%+2.55

Im very disappointed in this filter

Filter has stopped working, really

I would not recommend this filter

Leak-Proof9%

leaked

Leaked

Product is leaking

Size-Overall8%−0.05

huge

don't fit together properly

the pipework going to the tank is quite short

Durability8%−0.13

Suddenly stopped working after only a couple months use

Already broken

Doesnt last

Quality-Overall7%+0.56

Absolutely rubbish

Very poor quality

Bad quality seller unreachable

Love

Filtration40%+2.55

Decent filter

Great quality filter

Best filter

Quality-Overall17%+0.56

It feels well made

high-quality essential for anyone who wants a professional-looking tank

Very good quality

Value For Money12%+0.63

worth the price

Good for the price

Value for money

Spray/Flow4%+0.11

Adjustable flow is brilliant on it

the flow is decent

has good flow options

Ease Of Cleaning4%+0.46

Easy to clean

Easy to set up and clean

Keeps my tank clean

Return

1.4% Return rate 28% Fixable by listing

Size-Overall25%▄▆▄▅██

huge

don't fit together properly

the pipework going to the tank is quite short

Functionality-Overall16%▇▄▇█▅▄

IS NOT WORKING

I couldnt get it to work effectively

After just a month, however, the filter is constantly filling with air and causing the pump to choke, which is leading to it stopping running

Filtration13%█▇██▄█

Im very disappointed in this filter

Filter has stopped working, really

I would not recommend this filter

Leak-Proof12%▄▄▄█▄▃

leaked

Leaked

Product is leaking

Defective Material/Parts10%█▄▅▄▆▅

FAQ

Common External Filter Aquarium questions

Answered from the same tracked data.