How Many White Cloud Mountain Minnows in a 20 Gallon Tank?
About 11–14 — based on adult size, bioload, and real water volume.
In a 20-gallon tank you can comfortably keep about 11–14 white cloud mountain minnow — enough for a proper school, on their own with good filtration and regular water changes. Add fewer if you're mixing in other species.
How we get that number
An adult white cloud mountain minnow reaches about 1.5" and has a low bioload. Working from real water volume and waste output (not the old one-inch-per-gallon myth), a 20-gallon tank supports roughly 11–14 of them. Because white cloud mountain minnow are schooling fish, keep them in a group of at least 6 — never just one or two. They need 60–72°F water at pH 6–8.
Build your exact stocking with the calculator → Full white cloud mountain minnow care guide →
Gear for a 20-gallon tank
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