47
1 gallon fish tank filter
Skip itBrand-locked demand (top 5 brands take 96% of clicks) — this niche doesn't clear our bar today.
Avg price
Great$48.69avg listing price — sweet spot $15–$100
Quality gap
Great4.3★avg incumbent rating — lower means beatable quality
Market size
Good$385K$385K/yr · 179K searches
Competition
Good52%top-5 click share — leaders hold, buyers still browse
Conversion
Good4.4%search→purchase rate — share of searches ending in a sale
Returns
Good2.8%return rate — above 6% kills the launch gate
Review moat
Okay3,002.56avg incumbent reviews — the moat a new listing must climb
Price range
Okay$7.75–$314.10cheapest 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
Bad96%top-5 brand share — brand-locked demand