Quick Stats
| Adult Size | 6–10 cm |
| Minimum Tank | 20 gal |
| Temperature | 20–28°C |
| pH Range | 7.0–8.5 |
| Hardness (GH) | 8–20 dGH |
| Difficulty | Medium |
| Temperament | Peaceful (but eats plants) |
| Diet | Herbivore — plants, vegetables, algae wafers (will eat live plants) |
| Schooling | 1 per 10 gal |
Tank Setup
Apple snails (Pomacea canaliculata) are the largest commonly-available aquarium snail. A single adult can reach 10 cm (the size of a small apple — hence the name). A 20 gallon tank is the realistic minimum for one; they produce enormous amounts of waste for a snail.
Water parameters: temperature 20–28°C, pH 7.0–8.5, hardness 8–20 dGH. Like all snails, they need calcium for shell health — harder water is better, or supplement with cuttlebone. They breathe air using a siphon and need to surface regularly.
Provide a tank with a lid — they escape. Leave a 2–3 cm air gap below the lid for breathing and egg-laying. The tank must be cycled before adding them; their bioload is significant and they will not tolerate ammonia or nitrite.
Tank Mates
Apple snails are peaceful but their size means they can bulldoze small fish at feeding time. They are best kept with mid-water community fish that won't bother them and won't be crushed by a 10 cm snail climbing the glass.
Compatible with: larger Tetras, Guppies, Platies, Swordtails, Gouramis, Corydoras, and medium-sized community fish. Avoid housing with small delicate species that might be injured by a falling snail. Also avoid snail-eaters (loaches, puffers).
Do not keep with shrimp if you want the shrimp to thrive — apple snails outcompete shrimp for food and produce enough waste to degrade shrimp water quality. Amano shrimp (larger) are usually fine; cherry shrimp will struggle.
Diet & Feeding
Apple snails are voracious herbivores. They will eat live plants — and not just soft plants. Java fern, Anubias, Vallisneria, and even tough plants like Amazon Sword will be grazed. This is the key difference from Mystery Snails (Pomacea bridgesii), which are safe for plants.
Feed generously with lettuce, spinach, zucchini, cucumber, carrots (blanched), and algae wafers. A single adult apple snail can eat half a lettuce leaf per day. Without enough food they turn to your plants — and they will demolish a planted tank in days.
Many keepers house apple snails in fish-only tanks (no live plants) specifically to avoid the plant-eating issue. If you want a planted tank with snails, choose Mystery Snails or Nerite Snails instead.
Common Health Issues
Apple snails are hardy when their dietary needs are met. The main health issue is shell erosion from soft water or insufficient calcium. The fix is the same as for all snails: harder water, cuttlebone, or crushed coral.
They are sensitive to copper and many fish medications — always remove them before treatment. They are also sensitive to rapid pH swings; acclimate new snails slowly over an hour.
Lifespan is typically 2–4 years. They grow fast — a 2 cm juvenile can reach 8 cm in 6 months with abundant food. The species is banned or restricted in many countries (including parts of the US) because it's an agricultural pest in rice-growing regions.
Breeding
Apple snails are not hermaphroditic — you need a male and a female. Females lay bright pink-orange egg clusters above the waterline, often on the tank lid or glass. Each cluster contains 200–600 eggs — far more than Mystery Snails.
If you don't want hundreds of baby snails, remove the egg clusters immediately and freeze them for 24 hours before disposal. Do not flush them — they can hatch in waterways and become invasive.
Eggs hatch in 2–3 weeks depending on temperature. The juveniles drop into the water and immediately start eating. They grow quickly and reach adult size within 6–12 months. Be prepared to house or rehome potentially hundreds of juveniles if you let a cluster hatch.
Frequently Asked Questions
What's the difference between Apple Snails and Mystery Snails?
They are closely related but distinct species. Apple Snails (Pomacea canaliculata) grow much larger (up to 10 cm), eat live plants, and lay 200–600 eggs per cluster. Mystery Snails (Pomacea bridgesii) stay smaller (5–6 cm), don't eat plants, and lay 50–200 eggs per cluster. Always confirm which species you're buying.
Will Apple Snails eat my plants?
Yes — Apple Snails are voracious herbivores that will eat live plants, including tough ones like Java fern and Anubias. If you want a planted tank, choose Mystery Snails or Nerite Snails instead. Apple Snails belong in fish-only tanks.
Are Apple Snails illegal?
They are restricted or banned in some regions (including parts of the US, Australia, and the EU) because they are agricultural pests in rice-growing areas. Always check local regulations before purchasing, and never release them into wild waterways.
How big do Apple Snails get?
Up to 10 cm in shell diameter — the size of a small apple, hence the name. They grow fast: a 2 cm juvenile can reach 8 cm in 6 months with abundant food. A 20 gallon tank is the minimum for a single adult.