---
title: "Search terms — 20 gallon fish tank filter - Flapen"
canonical_url: "https://flapen.com/research/us/pet-supplies/20-gallon-fish-tank-filter/search-terms"
last_updated: "2026-07-21T20:57:36.041Z"
locale: en
meta:
  description: "Niche score 50/100 · $326K/yr market · 270K searches/yr · $25.82 avg price. Soft demand (-4.6% this quarter) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 50/100 · $326K/yr market · 270K searches/yr · $25.82 avg price. Soft demand (-4.6% this quarter) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Search terms — 20 gallon fish tank filter - Flapen"
---

# **20 gallon fish tank filter**

**Worth a look**

Shows a sweet-spot price point ($25.82 avg), but soft demand (-4.6% this quarter) keeps it on the watch list.

Market size 52Growth 23Conversion 56Competition 45Returns 31Price range 83Avg price 95Brand share 54Review moat 24Quality gap 83

**Avg price**

**Incredible****$25.82**

avg listing price — sweet spot $15–$100

**Quality gap**

**Great****4.2★**

avg incumbent rating — lower means beatable quality

**Price range**

**Great****$10.66–$39.59**

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

**Conversion**

**Good****4.7%**

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

**Brand share**

**Good****73%**

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

**Market size**

**Good****$326K**

$326K/yr · 270K searches

**Competition**

**Okay****58%**

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

**Returns**

**Okay****5.2%**

return rate — above 6% kills the launch gate

**Review moat**

**Bad****6,349.95**

avg incumbent reviews — the moat a new listing must climb

**Growth**

**Bad****-4.6%**

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