Apple snail care guide

1How big do they get?

Identify the species before planning its home. P. canaliculata is described at 40–60 mm wide and 45–75 mm high. That is not a limit for the whole group: Defra records some Pomacea reaching roughly 150 mm in diameter.

Adult shell size

40–60 mm (Shell width) — varies 40–60 mm shell width is a P. canaliculata example only. Some Pomacea reach about 150 mm across. Fact source

2How long do they live?

A broad guide is 1–4 years, with some living longer. Species, age at purchase and temperature make a single group-wide lifespan unreliable.

Lifespan

1–4 years 04 years Broad group estimate; some exceed four years. Species and temperature matter. Fact source

3What do they eat?

Offer suitable sinking food and vegetables, adjusting portions to what is eaten. P. canaliculata readily eats vegetation; this does not make live display plants a sensible feeding plan.

Diet type

Omnivore Plant material, prepared foods and other organic food; preferences differ. Fact source

4Do they eat plants?

Which apple snail? P. canaliculata can strip living plants. P. diffusa usually prefers softer or dead material: see our mystery snail care guide. A yellow shell does not settle the identification.

Plant eating

Varies P. canaliculata eats live plants readily; mystery snails usually favour softer or dead material. Fact source

5Do they eat algae or clean the tank?

Some grazing is normal, but these are not dependable all-purpose algae removers. Choose one for its care needs and behaviour, not a cleaning promise.

Algae role

Some Some grazing; no whole-tank cleaning promise. Fact source

6What eats them?

Puffers, snail-eating loaches and some cichlids can injure or eat them. Persistent nipping can also prevent feeding and access to the surface.

Predators

Snail-eating loaches, puffers and predatory or persistent nipping fish. Fact source

7Are they safe with shrimp, fish and other snails?

Use species-specific advice before mixing with shrimp or smaller snails. Some Pomacea eat other snails. Peaceful fish still need compatible water and enough space.

With shrimp

Caution Do not assume every Pomacea is shrimp-safe. Confirm species and behaviour before mixing. Fact source

With fish

Caution Peaceful companions only; exclude snail predators and harassment. Fact source

With other snails

Caution Some apple snails eat other snails; the group is not uniformly snail-safe. Fact source

8How many per tank?

OATA gives 20 litres as a starting aquarium size for larger snails such as apple snails. Here that is limited to one medium animal around 5 cm, with established filtration. It is not a recommendation for a giant species: confirm adult size and allow substantially more room for large animals or companions.

Starting tank volume with conditions

20 litres Baseline for one medium apple snail around 5 cm, with filtration. Not sufficient guidance for giant Pomacea or extra livestock; confirm adult size. Fact source

9Do they need a heater, or can they live in cold water?

The specialist guide gives 18–28°C for aquarium care. Use the identified species to choose a stable target; the ability of some wild populations to survive cold periods is not an aquarium recommendation.

Recommended water temperature

18–28 °C 1530 °C Broad specialist aquarium guidance; choose a stable species-appropriate point within it. Fact source

10What water do they need?

The cited aquarium guide recommends pH 7.2–8.0 and KH 10–20°dKH. Confirm the species and companions before changing water. KH describes buffering, not general hardness.

pH

7.2–8 pH 69 pH Attributed aquarium guidance for Pomacea; confirm the species. Fact source

Hardness guidance with units

KH 10–20°dKH in the cited aquarium guide; confirm species and companions. Fact source

11How do they breed, and how fast?

Pomacea have separate sexes. A previously mated female can retain sperm, so keeping one alone does not guarantee infertile eggs. Plan for offspring before allowing clutches to develop.

Can reproduce in a freshwater aquarium

Yes Fact source

Breeding speed

Varies Egg production depends on species, temperature and food; large clutches can produce many young. Fact source

Pair needed

Yes Separate sexes for fertilisation, but females can store sperm and later lay fertile eggs alone. Fact source

12What do the eggs look like, and how long do they take to hatch?

Common aquarium types place conspicuous clutches above water. 14–28 days is a broad hatching estimate; temperature and humidity matter. Keep exposed clutches above water. Unusual species can brood differently, so identify the animal first.

Reproduction type

Egg laying Fact source

Hatching time

14–28 days Typical exposed aquarium egg-clutch estimate; species, temperature and humidity matter. Fact source

13Are they good or bad, and how do I get rid of them?

A fertile clutch can produce many young. Plan homes before breeding, and never release snails outdoors.\n\nUK context, checked 2 November 2026: Defra’s factsheet says Pomacea are no longer GB quarantine plant pests, while Northern Ireland retains quarantine controls. This is not blanket permission to import, sell or send them anywhere; check the applicable rules for the proposed movement.

Population growth concern

High Large fertile clutches can mean many juveniles. This rating concerns population potential, not every individual. Fact source

14Are they nocturnal, and why do they hide?

P. canaliculata is often more active after dark. Other species and temperatures produce different routines. Give sheltered resting places without deliberately inducing cold or dry dormancy.

Active time

Varies P. canaliculata often favours night; activity depends on species and temperature. Fact source

Burrows

Varies Some Pomacea retreat into mud during dormancy; this is not a requirement to induce in an aquarium. Fact source

15Can they survive out of water or climb out?

Secure the lid and gaps, while preserving ventilation and access to the water surface. Leaving the water is possible, especially around egg laying; a fall can damage the shell.

Secure lid needed

Yes Allow surface access and a ventilated air gap under a secure lid. Fact source

16Is it dead, or just not moving?

Resting or floating alone does not prove death. Check water and temperature, then look for a persistent change or decomposition. Remove a clearly dead animal promptly.

17Why is the shell damaged, and do they need calcium?

Calcium is needed for shell growth. If damage appears, review diet and water chemistry before supplementing.

Calcium required

Yes Fact source