Helmet Nerite Snail (Neritina pulligera)

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Helmet Nerite Snail—often sold as Military Helmet Nerite—is one of the toughest, most effective algae‑eating snails available for freshwater aquariums. Supplied by Aquarium Glaser, these snails are well acclimated, attractive, and ideal for planted, shrimp, and community tanks. Species Overview Common name: Helmet Nerite Snail / Military Helmet Nerite Scientific name: Neritina pulligera Family: Neritidae Adult size: ~2–3 cm (¾–1¼") Origin: Indo‑Pacific / Southeast Asia Supplier: Aquarium Glaser (Germany) Appearance Shell: Very hard, thick, “helmet‑shaped” shell Color: Dark brown, olive, charcoal, to near black Texture: Smooth to lightly ridged, extremely durable Visual appeal: Minimal patterning, bold solid coloration Helmet Nerites are prized for their rugged, armored look and exceptional shell strength, making them more resistant to minor bumps and curious fish than many other snails. Algae Control & Behavior Algae types eaten: Green film algae Brown diatoms Biofilm on glass, rocks, wood, and equipment Plant safety: ✅ 100% plant‑safe Temperament: Completely peaceful Activity: Mostly diurnal, steady grazers Helmet Nerites are considered one of the most reliable algae grazers for aquascapes where shrimp or herbivorous fish alone aren’t enough. Aquarium Requirements Tank size Minimum 5 gallons (19 L) per snail Larger, established tanks provide more natural grazing Water parameters Temperature: 22–26 °C (72–78 °F) pH: 7.0–8.5 (neutral to slightly alkaline) Hardness: Moderate to hard (important for shell health) Water quality: Ammonia & nitrite must be 0 ppm A lid or lowered water line is recommended—like all nerites, they may explore above the waterline. Feeding Primary diet: Natural algae & biofilm Supplement if tank is very clean: Algae wafers Blanched zucchini / spinach Avoid overfeeding—these snails thrive best with natural grazing Healthy shell growth benefits from adequate calcium (harder water, mineral additives, or cuttlebone if needed) Reproduction (Important for Customers) Will NOT reproduce in freshwater May lay small white eggs on glass or décor Eggs will not hatch unless moved to brackish/saltwater This makes Helmet Nerites perfect for aquarists who want algae control without snail population explosions. Compatibility Safe with: Shrimp (Amano, Neocaridina, Caridina) Community fish Otocinclus, Corydoras Other nerite snails Avoid housing with: Puffers Loaches Large cichlids or snail‑eating fish Show more