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small fish tank filter
Skip itBrand-locked demand (top 5 brands take 95% of clicks) — this niche doesn't clear our bar today.
Conversion
Incredible13.3%search→purchase rate — share of searches ending in a sale
Avg price
Good$12.89avg listing price — sweet spot $15–$100
Price range
Good$4.20–$29.55cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Good2.9%return rate — above 6% kills the launch gate
Competition
Okay57%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Market size
Okay$121K$121K/yr · 71K searches
Review moat
Bad5,090.56avg incumbent reviews — the moat a new listing must climb
Growth
Bad-11.1%90-day search growth — must beat 0% to launch
Brand share
Bad95%top-5 brand share — brand-locked demand