---
title: "Reviews — aquarium filter - Flapen"
canonical_url: "https://flapen.com/research/de/haustier/aquarium-filter/reviews"
last_updated: "2026-07-21T15:18:28.795Z"
locale: en
meta:
  description: "Niche score 59/100 · €478K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 59/100 · €478K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Reviews — aquarium filter - Flapen"
---

# **aquarium filter**

**Worth a look**

Shows a sweet-spot price point ($25.59 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 59Growth 15Conversion 33Competition 78Returns 53Price range 85Avg price 95Brand share 83Review moat 45Quality gap 84

**Avg price**

**Incredible****€25.59**

avg listing price — sweet spot $15–$100

**Price range**

**Great****€4.16–€91.50**

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

**Quality gap**

**Great****4.2★**

avg incumbent rating — lower means beatable quality

**Brand share**

**Great****52%**

top-5 brand share — no brand owns this niche

**Competition**

**Great****37%**

top-5 click share — an open shelf

**Market size**

**Good****€478K**

€478K/yr · 706K searches

**Returns**

**Good****2.9%**

return rate — above 6% kills the launch gate

**Review moat**

**Okay****1,960.24**

avg incumbent reviews — the moat a new listing must climb

**Conversion**

**Okay****2.6%**

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

**Growth**

**Bad****-19.2%**

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