---
title: "Reviews — external filter aquarium - Flapen"
canonical_url: "https://flapen.com/research/uk/pet-supplies/external-filter-aquarium/reviews"
last_updated: "2026-07-31T10:11:30.909Z"
locale: en
meta:
  description: "Niche score 49/100 · £153K/yr market · 151K searches/yr · £53.40 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:description": "Niche score 49/100 · £153K/yr market · 151K searches/yr · £53.40 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:title": "Reviews — external filter aquarium - Flapen"
---

# **external filter aquarium**

**Skip it**

Soft demand (-20.3% this quarter) — this niche doesn't clear our bar today.

Market size 33Growth 15Conversion 24Competition 42Returns 87Price range 95Avg price 92Brand share 30Review moat 64Quality gap 90

**Price range**

**Incredible****£24.32–£98.75**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Avg price**

**Great****£53.40**

avg listing price — sweet spot $15–$100

**Quality gap**

**Great****4.1★**

avg incumbent rating — lower means beatable quality

**Returns**

**Great****1.4%**

return rate — above 5% kills the launch gate

**Review moat**

**Good****943**

avg incumbent reviews — the moat a new listing must climb

**Competition**

**Okay****60%**

top-5 click share — leaders hold, buyers still browse

**Market size**

**Okay****£153K**

£153K/yr · 151K searches

**Brand share**

**Okay****87%**

top-5 brand share — brands hold most of the demand

**Conversion**

**Bad****1.9%**

search→purchase rate — share of searches ending in a sale

**Growth**

**Bad****-20.3%**

90-day search growth — must beat 0% to launch

**Signals**[** High Price**](https://flapen.com/research/niches?market=uk&signal=high_price "Avg price > $50")