How Many Endler's Livebearers in a 55 Gallon Tank?
About 46–56 — based on adult size, bioload, and real water volume.
In a 55-gallon tank you can comfortably keep about 46–56 endler's livebearer — 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 endler's livebearer reaches about 1.0" and has a low bioload. Working from real water volume and waste output (not the old one-inch-per-gallon myth), a 55-gallon tank supports roughly 46–56 of them. Because endler's livebearer are schooling fish, keep them in a group of at least 3 — never just one or two. They need 72–82°F water at pH 7–8.5.
Build your exact stocking with the calculator → Full endler's livebearer care guide →
Gear for a 55-gallon tank
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