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co2 regulator aquarium
Skip itBrand-locked demand (top 5 brands take 99% of clicks) — this niche doesn't clear our bar today.
Review moat
Great246.21avg incumbent reviews — the moat a new listing must climb
Avg price
Great$71.23avg listing price — sweet spot $15–$100
Quality gap
Great4.2★avg incumbent rating — lower means beatable quality
Price range
Good$29.95–$132.10cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Okay5.8%return rate — above 6% kills the launch gate
Competition
Bad72%top-5 click share — a locked-up shelf
Conversion
Bad1.8%search→purchase rate — share of searches ending in a sale
Growth
Bad-22.6%90-day search growth — must beat 0% to launch
Market size
Bad$37K$37K/yr · 29K searches
Brand share
Bad99%top-5 brand share — brand-locked demand