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Aquarium Filter

Aquarium Filter shows a $4.7M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Flapen Score

61
Worth a look

Top 12% of 3,978 Pet Supplies niches · +10 vs the category median of 51

Market size 97Growth 22Conversion 55Competition 74Returns 55Price range 41Avg price 95Brand share 55Review moat 23Quality gap 80
This niche Category average · 3,978 niches

Is Aquarium Filter profitable on Amazon?

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.

Aquarium Filter: the Amazon niche in one read

Everything a seller checks before entering, in three answers.

Is the demand real?

Worth a look. Search demand moved -6.2% over the last 90 days and 4.6% of searches end in a purchase.

$4.7M

revenue / yr

Units sold / yr150K
Search volume / yr-6.2%3.4M
Conversion rate4.6%
Avg price$30.25

Who owns the niche?

The top 5 brands hold 72% of demand, so 28% of the market is open.

28%

open market share

Brands · sellers23 · 82
Top-5 product click share41%
Open market28%
Avg brand age48 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 4.2★ — the gap to enter on.

0/100

page quality · 44 products

Sponsored placement75%
New entrants (1y)8· 8 succeeded
Avg rating4.2★
Avg reviews8,260

Top Aquarium Filter products & what they sell for

Every tracked product — its share of the shelf, its review moat, and what it sells for.

Competition: brands, sellers & click share

The top 5 products take 41% of clicks — established leaders, but buyers still shop beyond them.

$0$189K$378K$567K$757K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

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%

Aquarium Filter demand & seasonality

Weekly search volume, with the niche's key stats alongside.

Volume3.4MCVR4.6%Products44Brands23Top 5 Brands72%OOS Rate1.3%Rating4.2★Reviews8,260Avg BSR#34
90K70KPrime Day '25Spike '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.2×

Top Aquarium Filter search terms shoppers use

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

  • 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

What reviews say buyers love and hate about Aquarium Filter

What buyers mention most, as a share of all reviews.

What buyers love

80% of reviews
Filtration34%

Great filtration system

Value For Money11%

Cost effective

Quality-Overall8%

Excellent product

Ease Of Cleaning8%

Easy to clean

Size-Overall4%

Fit as expected

What buyers complain about

75% of reviews
Durability23%

Comes apart

Filtration16%

Does not filter at all

Quality-Overall7%

Get something higher quality

Functionality-Overall6%

it doesnt work very well

Leak-Proof5%

Leaked

Aquarium Filter return rate & reasons

Why buyers send it back, as a share of all return requests.

2.8%

Return rate

52%

Fixable by listing

The "fixable" share counts expectation-mismatch reasons — size, look, advertised-vs-actual — that better copy and images address.

1Size-Overall
46%
2Filtration
25%
3Functionality-Overall
7%
4Defective Material/Parts
4%
5Advertised Vs Actual Product
3%

Common Aquarium Filter questions

The questions sellers ask about this niche, answered from the tracked metrics.

Flapen scores Aquarium Filter 61/100 on Amazon United States — Worth a look. The niche generates $4.7M/yr across 44 tracked products. 8 of 8 products launched in the last 360 days are still selling. Search demand moved -6.2% over the last 90 days.
Search demand for Aquarium Filter on Amazon United States is steady year-round — the busiest month runs 1.2× the quietest.