Will Mystery Snails eat my live aquarium plants?

No. Pomacea diffusa is perfectly safe for planted tanks. They lack the jaw strength to consume healthy plant tissue and will only eat decaying or already dead leaves.

Why is my Mystery Snail's shell pitting and cracking?

Shell erosion is almost always caused by acidic water (pH below 7.0) or a lack of calcium. You can resolve this by adding crushed coral to your filter and feeding calcium-rich foods like blanched spinach.

How can I prevent my Mystery Snails from breeding?

Since they lay their large, pink egg clutches above the water line, controlling their population is very easy. Simply look out for the visible clutches on the aquarium glass or lid and scrape them off before they hatch.

Why is my snail floating at the top of the tank?

Mystery Snails sometimes trap air inside their shells, causing them to float. This is usually harmless and they will eventually expel the air and sink. However, if the snail is floating, inactive, and emits a foul odour, it may have died.

Are Mystery Snails hermaphrodites?

Unlike bladder or ramshorn snails, Mystery Snails are gonochoric, meaning you need both a male and a female to reproduce. This makes accidental population explosions far less likely.

FreshwaterTropicalBeginner

Mystery Snail

Pomacea diffusa

The Mystery Snail is a highly popular, peaceful, and colourful freshwater invertebrate that makes a superb algae-grazing addition to the community aquarium.

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Ideal Conditions

Temperature: 20 – 24 °C
pH range: 7.2 – 8.4
Hardness: 8 – 18 dGH
Adult size: 4 – 5 cm
Nano tank: 20 litres+
Lifespan: 1 – 2 years
Diet: omnivore

About the Mystery Snail

Mystery Snails, scientifically known as Pomacea diffusa, are arguably the most beloved freshwater snails in the aquarium hobby. Unlike many other snail species, they are entirely peaceful, completely safe for planted aquariums, and come in a dazzling array of shell colours including gold, magenta, ivory, and blue. They are entertaining to watch as they scour the tank for uneaten food and algae, occasionally extending a long, snorkel-like tube to breathe air from the water's surface.

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Is it right for your tank?

Check Mystery Snail against a habitat you already keep. We compare water type, temperature, pH, adult size, group needs and everything living there.

Where Mystery Snail comes from

Native range

South America, Amazon Basin

Countries / regions

Brazil, Bolivia, Peru

Habitat

Slow-moving rivers, ponds, and swamps with abundant aquatic vegetation.

Widely introduced outside its native range, including parts of North America and Asia, where it is often considered an invasive species.

Similar species

Channeled Apple Snail
Pomacea canaliculata
Nerite Snail
Neritina natalensis
Rabbit Snail
Tylomelania spp.

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Neon Tetra
Paracheirodon innesi
Peaceful, small fish that inhabit the middle water column and will completely ignore the snails.
Great
Cherry Shrimp
Neocaridina davidi
Excellent peaceful tankmates; they share similar peaceful temperaments and safely coexist while grazing on algae.
Great
Corydoras Catfish
Corydoras spp.
Gentle bottom dwellers that will forage alongside the snails without causing them any stress.
Great
Betta Fish
Betta splendens
Some aggressive Bettas may continually nip at the snail's delicate antennae, forcing the snail to stay hidden in its shell.
Compatible with caution
Clown Loach
Chromobotia macracanthus
Loaches are specialised snail predators and will extract and eat Mystery Snails, regardless of their size.
Not recommended
Pea Puffer
Carinotetraodon travancoricus
Despite their small size, Pea Puffers are aggressive snail hunters that will nip at the snail's soft flesh and slowly kill it.
Not recommended

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