Mystery Snail (Pomacea diffusa / bridgesii) is a beginner-level freshwater invertebrate that needs at least 5 gallons and 68-82°F. A big, charismatic scavenger that breathes air at the surface and lays eggs above the waterline. Keep a gap at the top of the tank. It can also nibble delicate plants if underfed.
Care facts at a glance
| Scientific name | Pomacea diffusa / bridgesii |
|---|---|
| Family | Ampullariidae |
| Origin | South America |
| Adult size | 2 in |
| Minimum tank | 5 gallons |
| Temperature | 68-82°F |
| pH | 7.0-8.0 |
| Temperament | Peaceful |
| Social behavior | Solitary or groups |
| Swim level | All levels |
| Difficulty | Beginner |
| Diet | Algae, veggies, sinking pellets |
| Typical lifespan | 1-3 years |
Quick tips
- Leave air space at the top.
- Needs calcium in the water for shell health.
- Feed veggies so plants are left alone.
San Diego water
Naturally suited to San Diego's hard, alkaline tap water once it is dechlorinated (the city uses chloramine, so use a conditioner that handles it). Learn the numbers in our San Diego tap water guide.
Before you buy
Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.
Find it at Pet Zone
Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.
4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm
Aquascaping, planted tanks
4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm
Monster fish, koi