45
phosphate remover aquarium
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.5%return rate — above 6% kills the launch gate
Conversion
Incredible15.9%search→purchase rate — share of searches ending in a sale
Avg price
Great$21.73avg listing price — sweet spot $15–$100
Price range
Great$5.43–$60.10cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Okay1,725avg incumbent reviews — the moat a new listing must climb
Market size
Okay$156K$156K/yr · 45K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Growth
Bad-2.9%90-day search growth — must beat 0% to launch
Competition
Bad81%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand