45
hot tub salt water conversion kit
Skip itPrices mostly outside the sweet spot ($54.54–$428.14) — this niche doesn't clear our bar today.
Review moat
Incredible59.67avg incumbent reviews — the moat a new listing must climb
Quality gap
Great4.1★avg incumbent rating — lower means beatable quality
Avg price
Good$167.40avg listing price — sweet spot $15–$100
Growth
Okay+19.4%90-day search growth — must beat 0% to launch
Conversion
Okay3.9%search→purchase rate — share of searches ending in a sale
Brand share
Okay80%top-5 brand share — brands hold most of the demand
Market size
Okay$127K$127K/yr · 20K searches
Returns
Okay4.7%return rate — above 5% kills the launch gate
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Price range
Bad$54.54–$428.14cheapest to priciest tracked listing — scored on the share inside $15–$100