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berkey fluoride filters
Skip itA concentrated shelf (top 5 take 96% of clicks) — this niche doesn't clear our bar today.
Conversion
Great10.3%search→purchase rate — share of searches ending in a sale
Avg price
Great$71.42avg listing price — sweet spot $15–$100
Returns
Good2.1%return rate — above 5% kills the launch gate
Review moat
Good761.56avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Price range
Okay$29.43–$203.67cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Bad$92K$92K/yr · 12K searches
Growth
Bad-11.2%90-day search growth — must beat 0% to launch
Brand share
Bad98%top-5 brand share — brand-locked demand
Competition
Bad96%top-5 click share — a locked-up shelf
Signals High Price