---
title: "Trend — co2 diffusor aquarium - Flapen"
canonical_url: "https://flapen.com/research/de/haustier/co2-diffusor-aquarium/trend"
last_updated: "2026-08-09T22:36:04.368Z"
locale: en
meta:
  description: "Niche score 53/100 · €67K/yr market · 119K searches/yr · €15.66 avg price. Soft demand (-44.9% this quarter) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 53/100 · €67K/yr market · 119K searches/yr · €15.66 avg price. Soft demand (-44.9% this quarter) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Trend — co2 diffusor aquarium - Flapen"
---

# **co2 diffusor aquarium**

**Worth a look**

Shows beatable incumbent ratings (4.2★), but soft demand (-44.9% this quarter) keeps it on the watch list.

Market size 17Growth 3Conversion 45Competition 79Returns 63Price range 63Avg price 77Brand share 79Review moat 78Quality gap 84

**Quality gap**

**Great****4.2★**

avg incumbent rating — lower means beatable quality

**Competition**

**Great****36%**

top-5 click share — an open shelf

**Brand share**

**Great****56%**

top-5 brand share — no brand owns this niche

**Review moat**

**Great****447.65**

avg incumbent reviews — the moat a new listing must climb

**Avg price**

**Great****€15.66**

avg listing price — sweet spot $15–$100

**Returns**

**Good****2.5%**

return rate — above 5% kills the launch gate

**Price range**

**Good****€5.88–€141.02**

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

**Conversion**

**Okay****3.6%**

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

**Market size**

**Bad****€67K**

€67K/yr · 119K searches

**Growth**

**Bad****-44.9%**

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

## Trend