How Many Mystery Snails in a 55 Gallon Tank?
About 22–28 — based on adult size, bioload, and real water volume.
About 22–28 mystery snail
Photo via Wikimedia Commons
In a 55-gallon tank you can comfortably keep about 22–28 mystery snail, 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 mystery snail reaches about 2.0" 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 22–28 of them. They need 68–82°F water at pH 7–8.
Build your exact stocking with the calculator → Full mystery snail care guide →
Gear for a 55-gallon tank
As an Amazon Associate we earn from qualifying purchases.
FAQ
How many mystery snail can I keep in a 55 gallon tank?
About 22–28 mystery snail, kept on their own with good filtration. Add fewer when combining with other species — use the stocking calculator to be sure.