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Fish Tank Syphon

Fish Tank Syphon shows beatable incumbent ratings (3.9★), but a small market ($64K/yr) keeps it on the watch list.

Flapen Score

53
Worth a look
Market size 16Growth 16Conversion 76Competition 52Returns 86Price range 59Avg price 33Brand share 79Review moat 43Quality gap 97
This niche Category average

Is Fish Tank Syphon profitable on Amazon?

According to Flapen's Amazon United Kingdom niche tracking, Fish Tank Syphon is a £64K/yr Amazon United Kingdom market (88K searches/yr). The top 5 brands hold 56% of demand. Verdict: Worth a look — 53/100.

Fish Tank Syphon: 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 -17.1% over the last 90 days and 7.3% of searches end in a purchase.

£64K

revenue / yr

Units sold / yr8K
Search volume / yr-17.1%88K
Conversion rate7.3%
Avg price£9.97

Who owns the niche?

The top 5 brands hold 56% of demand, so 44% of the market is open.

44%

open market share

Brands · sellers21 · 30
Top-5 product click share54%
Open market44%
Avg brand age41 months

Is there a way in?

Listing quality. The average product page scores 0/100 on content standards. Incumbents average 3.9★ — the gap to enter on.

0/100

page quality · 24 products

Sponsored placement92%
New entrants (1y)6· 1 succeeded
Avg rating3.9★
Avg reviews2,225

Top Fish Tank Syphon 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 54% of clicks — established leaders, but buyers still shop beyond them.

£0£3K£6K£10K£13K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

21 rising

Sellers

30

Top-5 brand share

56%

Top 20: 99%

Top-5 click share

54%

Top 20: 97%

Open market

36%

  • Luigi's19%
  • QZQ14%
  • boxtech9%
  • NICREW8%
  • Interpet7%
  • enomol7%

Fish Tank Syphon demand & seasonality

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

Volume88KCVR7.3%Products24Brands21Top 5 Brands56%OOS Rate2.9%Rating3.9★Reviews2,225Avg BSR#23
2K2KSpike '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.4×

Top Fish Tank Syphon search terms shoppers use

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

  • fish tank syphon22K/yr
  • aquarium syphon16K/yr
  • aquarium siphon11K/yr
  • aquarium water change pump10K/yr
  • fish tank siphon9K/yr
  • fish tank water change pump6K/yr
  • fish tank syphon gravel cleaner7K/yr
  • syphon pump fish tank4K/yr
  • aquarium syphon pump2K/yr

What reviews say buyers love and hate about Fish Tank Syphon

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

What buyers love

83% of reviews
Ease Of Cleaning24%

useful cleaning kit

Ease Of Use20%

Easy to use

Quality-Overall12%

Product is absolutely top notch

Value For Money10%

Excellent product for the money

Advertised Vs Actual Product8%

Better than expected

What buyers complain about

72% of reviews
Quality-Overall19%

just not the best quality build

Durability17%

Broke very easily

Functionality-Overall7%

DOES NOT WORK

Ease Of Cleaning7%

doesn't make cleaning any easier sadly

Value For Money6%

Cheap, would not buy again

Fish Tank Syphon return rate & reasons

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

1.4%

Return rate

24%

Fixable by listing

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

1Functionality-Overall
32%
2Size-Overall
17%
3Defective Material/Parts
9%
4Quality-Overall
6%
5Durability
5%

Common Fish Tank Syphon questions

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

Flapen scores Fish Tank Syphon 53/100 on Amazon United Kingdom — Worth a look. The niche generates £64K/yr across 24 tracked products. 1 of 6 products launched in the last 360 days are still selling. Search demand moved -17.1% over the last 90 days.
Search demand for Fish Tank Syphon on Amazon United Kingdom is steady year-round — the busiest month runs 1.4× the quietest.