---
title: "Reviews — 1 gallon fish tank filter - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/1-gallon-fish-tank-filter/reviews"
last_updated: "2026-07-21T21:01:42.612Z"
locale: en
meta:
  description: "Niche score 47/100 · $385K/yr market · 179K searches/yr · $48.69 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:description": "Niche score 47/100 · $385K/yr market · 179K searches/yr · $48.69 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:title": "Reviews — 1 gallon fish tank filter - Flapen"
---

# **1 gallon fish tank filter**

**Skip it**

Brand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.

Market size 55Growth 20Conversion 54Competition 55Returns 54Price range 28Avg price 94Brand share 11Review moat 35Quality gap 76

**Avg price**

**Great****$48.69**

avg listing price — sweet spot $15–$100

**Quality gap**

**Great****4.3★**

avg incumbent rating — lower means beatable quality

**Market size**

**Good****$385K**

$385K/yr · 179K searches

**Competition**

**Good****52%**

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

**Conversion**

**Good****4.4%**

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

**Returns**

**Good****2.8%**

return rate — above 6% kills the launch gate

**Review moat**

**Okay****3,002.56**

avg incumbent reviews — the moat a new listing must climb

**Price range**

**Okay****$7.75–$314.10**

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

**Growth**

**Bad****-9.4%**

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

**Brand share**

**Bad****96%**

top-5 brand share — brand-locked demand