Pet Supplies
Hewnda 1 LB Natural Black Sand Aquarium Substrate | Polished Black Quartz Gravel Decorative Sand for Fish Tank,Succulent Top Dressing,Mini Landscape, Vase Filler,Ashtray Sand
Bias-adjusted across 552 Amazon ratings, Bayesian-shrunk to the category prior so the headline score reflects relative quality — not a raw star average. Cohort: Pet Supplies.
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How the score was built
- Amazon ratings
- 552
- Raw star average
- 3.8 / 5
- Bayesian avg
- 3.88
used for the Bayesian percentile
unadjusted Amazon mean
raw rating shrunk to the category prior
Buy it: View on Amazon →
Same category · Pet Supplies
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