🌡️ Invertebrate Specifications & Water Parameters
Parameter | Specification | Technical Notes |
Scientific Name | Vittina semiconica | Authentic, high-grade species (Syn: Neritina semiconica) |
Common Names | Red Spotted Onion Snail, Onion Nerite | Universally searched high-traffic trade names |
Maximum Size | 0.8 – 1.2 inches (2.0 – 3.0 cm) | Slightly larger than Horned Nerites, allowing them to cover more surface area |
Diet | Herbivore / Algae Eater | Feeds strictly on natural aquarium biofilm, diatoms, and algae varieties |
Behavior | Completely Peaceful | Safe to house alongside delicate shrimp, growing fry, and peaceful nano fish |
🛠️ Lighting, Temperature & Maintenance Guide
Lighting Requirements: Highly Adaptable. The snails themselves do not have specific lighting needs. However, medium-to-high intensity full-spectrum lighting setups are recommended as they naturally promote the growth of healthy micro-algae and biofilms, keeping your cleanup crew well-fed.
Temperature Parameters: Maintains optimal metabolic activity and movement within a standard tropical range of 22°C – 26°C (72°F – 79°F). Avoid sharp or sudden temperature fluctuations.
Water Chemistry & Shell Health: Requires a pH range of 7.2 – 8.2 and moderate-to-hard water parameters (gH above 8, kH above 4). Dissolved minerals and calcium are critical to support healthy shell growth, keeping their vibrant red-amber coloration thick, glossy, and free of structural pitting.
Aquarium Escape Caution: Like all nerite species, Onion Snails are excellent tidal climbers. They may occasionally breach the water line or attempt to explore outside open-top tanks if water quality drops or food becomes scarce. A tight-fitting lid or dropping the water level an inch below the rim is highly advised.

