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aqueon replacement filter cartridges large
Skip itBrand-locked demand (top 5 brands take 95% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.8%return rate — above 6% kills the launch gate
Conversion
Incredible12.3%search→purchase rate — share of searches ending in a sale
Avg price
Great$21.23avg listing price — sweet spot $15–$100
Price range
Great$6.38–$41.65cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good$318K$318K/yr · 122K searches
Competition
Okay63%top-5 click share — leaders hold, buyers still browse
Review moat
Bad6,283.95avg incumbent reviews — the moat a new listing must climb
Growth
Bad-4.8%90-day search growth — must beat 0% to launch
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Brand share
Bad95%top-5 brand share — brand-locked demand