---
title: "Reviews — aquarium filter - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/aquarium-filter/reviews"
last_updated: "2026-07-21T20:51:03.689Z"
locale: en
meta:
  description: "Niche score 61/100 · $4.7M/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 61/100 · $4.7M/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 $4.7M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 97Growth 22Conversion 55Competition 74Returns 55Price range 41Avg price 95Brand share 55Review moat 23Quality gap 80

**Market size**

**Incredible****$4.7M**

$4.7M/yr · 3.4M searches

**Avg price**

**Incredible****$30.25**

avg listing price — sweet spot $15–$100

**Quality gap**

**Great****4.2★**

avg incumbent rating — lower means beatable quality

**Competition**

**Good****41%**

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

**Conversion**

**Good****4.6%**

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

**Brand share**

**Good****72%**

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

**Returns**

**Good****2.8%**

return rate — above 6% kills the launch gate

**Price range**

**Okay****$6.37–$211.38**

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

**Review moat**

**Bad****8,260.34**

avg incumbent reviews — the moat a new listing must climb

**Growth**

**Bad****-6.2%**

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