---
title: "Trend — hot tub mineral cartridge - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/hot-tub-mineral-cartridge/trend"
last_updated: "2026-08-10T04:46:05.307Z"
locale: en
meta:
  description: "Niche score 63/100 · $65K/yr market · 15K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:description": "Niche score 63/100 · $65K/yr market · 15K searches/yr. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
  "og:title": "Trend — hot tub mineral cartridge - Flapen"
---

# **hot tub mineral cartridge**

**Worth a look**

Shows low returns (0.3%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 16Growth 45Conversion 95Competition 75Returns 99Price range 91Avg price 95Brand share 71Review moat 73Quality gap 37

**Returns**

**Incredible****0.3%**

return rate — above 5% kills the launch gate

**Conversion**

**Incredible****12.7%**

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

**Avg price**

**Incredible****$34.58**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$11.28–$91.12**

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

**Competition**

**Great****40%**

top-5 click share — an open shelf

**Review moat**

**Good****596.37**

avg incumbent reviews — the moat a new listing must climb

**Brand share**

**Good****63%**

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

**Growth**

**Okay****+15.7%**

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

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Market size**

**Bad****$65K**

$65K/yr · 15K searches

## Trend