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Mystery snail tank mates and minimum tank size

Pomacea diffusa

Mystery snails grow to 5 cm (2 in). They graze algae and leftover food. They need 21–26 °C (70–79 °F) and pH 7.2 or higher.

Minimum tank

19 L (5 US gal)

Adult size

5 cm (2 in)

Temperature

21–26 °C (70–79 °F)

pH

pH 7.2 or higher

Group

no minimum

Mystery snail minimum tank size

Mystery snails need at least 19 L (5 US gal).

That is the largest minimum among the sources below. The planner also checks the tank length against the adult size of 5 cm (2 in): a tank shorter than 4 times that is cramped.

Mystery snail tank mates

Each of the other 52 species in this reference, judged against mystery snails by the same rules as the compatibility checker. A guide, not a guarantee.

Compatible (17)

• Bronze corydoras
• Cherry barb
• Cherry shrimp
• Convict cichlid
• Endler's livebearer
• Guppy
• Molly
• Nerite snail
• Paradise fish
• Pearl gourami
• Platy
• Rosy barb
• Siamese algae eater
• Swordtail
• Tiger barb
• White cloud mountain minnow
• Zebra danio

With care (18)

• AngelfishThe only temperature that suits both is 25.6–26 °C (78–79 °F), set by angelfish and mystery snails. That leaves no margin. The only pH that suits both is pH 7.2–7.4, set by mystery snails and angelfish. That leaves no margin.
• BettaThe only pH that suits both is pH 7.2–7.5, set by mystery snails and bettas. That leaves no margin. Mystery snails and bettas: only calm bettas leave its antennae alone.
• Black neon tetraThe only pH that suits both is pH 7.2–7.5, set by mystery snails and black neon tetras. That leaves no margin.
• Bristlenose plecoThe only pH that suits both is pH 7.2–7.5, set by mystery snails and bristlenose plecos. That leaves no margin.
• Celestial pearl danioThe only pH that suits both is pH 7.2–7.5, set by mystery snails and celestial pearl danios. That leaves no margin.
• Common plecoThe only pH that suits both is pH 7.2–7.5, set by mystery snails and common plecos. That leaves no margin.
• Congo tetraThe only pH that suits both is pH 7.2–7.5, set by mystery snails and Congo tetras. That leaves no margin.
• Dwarf gouramiThe only pH that suits both is pH 7.2–7.5, set by mystery snails and dwarf gouramis. That leaves no margin.
• Glowlight tetraThe only pH that suits both is pH 7.2–7.5, set by mystery snails and glowlight tetras. That leaves no margin.
• GoldfishThe only temperature that suits both is 21–21.1 °C (70–70 °F), set by mystery snails and goldfish. That leaves no margin.
• Honey gouramiThe only pH that suits both is pH 7.2–7.5, set by mystery snails and honey gouramis. That leaves no margin.
• KribensisThe only pH that suits both is pH 7.2–7.5, set by mystery snails and kribensis. That leaves no margin.
• Lemon tetraThe only pH that suits both is pH 7.2–7.5, set by mystery snails and lemon tetras. That leaves no margin.
• OtocinclusThe only pH that suits both is pH 7.2–7.5, set by mystery snails and otocinclus. That leaves no margin.
• Panda corydorasThe only pH that suits both is pH 7.2–7.4, set by mystery snails and panda corydoras. That leaves no margin.
• Pygmy corydorasThe only pH that suits both is pH 7.2–7.4, set by mystery snails and pygmy corydoras. That leaves no margin.
• Red tail sharkThe only pH that suits both is pH 7.2–7.5, set by mystery snails and red tail sharks. That leaves no margin.
• Serpae tetraThe only pH that suits both is pH 7.2–7.5, set by mystery snails and serpae tetras. That leaves no margin.

Not compatible (17)

• Black skirt tetraMystery snails need pH 7.2 or higher; black skirt tetras need pH 6.0–7.0. No pH suits both.
• Boeseman's rainbowfishBoeseman's rainbowfish need 27–30 °C (81–86 °F); mystery snails need 21–26 °C (70–79 °F). No temperature suits both.
• Cardinal tetraMystery snails need pH 7.2 or higher; cardinal tetras need pH 4.0–6.0. No pH suits both.
• Chili rasboraMystery snails need pH 7.2 or higher; chili rasboras need pH 6.5–7.0. No pH suits both.
• Clown loachMystery snails need pH 7.2 or higher; clown loaches need pH 5.0–7.0. No pH suits both. Clown loaches eat snails, mystery snails included.
• Cockatoo dwarf cichlidMystery snails need pH 7.2 or higher; cockatoo dwarf cichlids need pH 6.0. No pH suits both.
• DiscusMystery snails need pH 7.2 or higher; discus need pH 5.0–7.0. No pH suits both. The only temperature that suits both is 26 °C (79 °F), set by discus and mystery snails. That leaves no margin.
• Ember tetraMystery snails need pH 7.2 or higher; ember tetras need pH 5.0–7.0. No pH suits both.
• German blue ramGerman blue rams need 27–30 °C (81–86 °F); mystery snails need 21–26 °C (70–79 °F). No temperature suits both. Mystery snails need pH 7.2 or higher; German blue rams need pH 5.0–6.0. No pH suits both.
• Glass catfishMystery snails need pH 7.2 or higher; glass catfish need pH 4.0–7.0. No pH suits both.
• Harlequin rasboraMystery snails need pH 7.2 or higher; harlequin rasboras need pH 5.0–7.0. No pH suits both.
• Kuhli loachMystery snails need pH 7.2 or higher; kuhli loaches need pH 5.5–6.5. No pH suits both.
• Neon tetraMystery snails need pH 7.2 or higher; neon tetras need pH 5.0–7.0. No pH suits both.
• OscarOscars eat snails, mystery snails included. The only pH that suits both is pH 7.2–7.5, set by mystery snails and oscars. That leaves no margin.
• Peppered corydorasMystery snails need pH 7.2 or higher; peppered corydoras need pH 6.0–7.0. No pH suits both.
• Rummy-nose tetraMystery snails need pH 7.2 or higher; rummy-nose tetras need pH 5.5–6.0. No pH suits both.
• Yoyo loachYoyo loaches eat snails, mystery snails included. The only pH that suits both is pH 7.2–7.5, set by mystery snails and yoyo loaches. That leaves no margin.

Sources

Where sources differ, the value shown is computed as the most cautious one.

Behaviour notes are from Aquarium Co-op care guides, read 2026-10-26.

Check against another species Plan a tank