Should I buy it?
Nerite Snail
Neritina natalensis
Typical trade / ID note: Neritina natalensis (and trade-name relatives in Neritidae)
Also known as: zebra nerite, horned nerite, tiger nerite, olive nerite, Zebra nerite, Tiger nerite, Olive nerite, Horned nerite
Fishori provides conservative planning guidance, not guarantees.
Based on typical aquarium care sources; details may vary between setups. Use the numbers here as planning defaults — your room, water, and routine still shape real-world outcomes.
The best freshwater algae snail on the hobby market, with the trade-off that the white egg capsules look untidy and cannot be hatched.
Best for
Any established planted tank 20L or more wanting glass and substrate algae cleared without plant damage or uncontrolled breeding.
Avoid if
You keep pea puffers or assassin snails, or you cannot tolerate white egg capsules on hard surfaces.
Top things that go wrong
- Shrimp & snails. Compatible with shrimp; not safe alongside assassin snails which will pick off small nerites.
Common mistakeExpecting nerite eggs to hatch. They deposit capsules in freshwater but larvae require brackish to develop, the eggs are a cosmetic issue, not a breeding problem.
What most shops don't tell you
- 1.White egg capsules cement to every hard surface and do not hatch in freshwater. A keeper either accepts them as background texture or scrapes them off.
- 2.Soft acidic planted tanks with no calcium top-up. The shell pits and cracks within months, and the snail dies slowly.
- 3.Open-top tanks. Nerites walk out overnight and dry on the floor by morning. A loose-fitting lid or a glass strip across feeding holes solves it.
- 4.Three things matter on day one. Hard alkaline water for shell health, a tight lid because nerites climb out, and a calcium source (cuttlebone, crushed coral substrate) in soft-water tanks. A nerite in a 6.5 pH soft-water tank pits its shell in months.
About this species
Nerite snails are small algae-grazing snails from Neritidae. They sit on glass and decor and graze soft algae down to clean. Best freshwater algae snail on the market, with one catch: they cannot breed in freshwater. Females lay tough white egg capsules on every hard surface that never hatch.
- Blue Dream Shrimp20L min · same group, comparable tank size
- Cherry Shrimp20L min · same group, comparable tank size
- Malaysian Trumpet Snail20L min · same group, comparable tank size
- Assassin Snail30L min · same group, comparable tank size
- Amano Shrimp40L min · same group, similar adult size
- Ghost Shrimp40L min · same group, similar adult size
- Mystery Snail40L min · same group, similar adult size
- Bamboo Shrimp80L min · same fish family
- Amano Shrimpalso beginner peaceful, similar tank size
- Assassin Snailalso beginner peaceful, similar tank size
- Beckford Pencilfishalso beginner peaceful, similar tank size
- Black Neon Tetraalso beginner peaceful, similar tank size
- Bloodfin tetraalso beginner peaceful, similar tank size
- Blue Dream Shrimpalso beginner peaceful, similar tank size
- Blue Dream Shrimp tank mateslists this fish as a safe and recommended mate
- Cherry Shrimp tank mateslists this fish as a safe and recommended mate
Plan grid
Key limits are shown above; this section adds planning detail: pH band, swim level, bioload and activity, and the radar.
Swim zones
Planning trait chart
Six indices for comparing species on paper before you spend.
- Beginner ease82
- Peacefulness90
- Community fit82
- Small-tank fit100
- Hardiness76
- Energy24
Numbers are deterministic planning indices from Fishori fields — not a scientific score of your individual fish.
Common setup sketches
Conservative patterns from Fishori fields — still run the pair checker for every species you add; sketches are not a stocking guarantee.
Rough 90L+ layout: one calm centrepiece, 8–12 small tetras/rasboras, 6–8 corydoras-type bottom fish — verify every name in the pair checker before buying.
Safe directions on file include: Neon Tetra, Corydoras Catfish, Harlequin Rasbora.
Tank mate intelligence
Use the "Often compatible" lists as a shortlist, not a stocking plan. Always run the pair tool and check the footprint of your actual tank first. Verify behaviour for Nerite Snail against your own reading before you buy.
Pair-level compatibility with this fish as anchor.
Read the blocking rule on each pair page before experimenting.
Do-not-stock combinations on conservative hobby rules.
Compare with
Run a real pair check: Nerite Snail + Neon Tetra
Behaviour, temperament, and what to watch
Prose and lists come from the same record: read temperament first, then glass-level signals so you are not surprised after day three.
Nerite Snail is peaceful in mixed company.
Stress / aggression triggers on file
- Sudden crowding
- Poor water quality
Fin nipping: Not a habitual fin-nipper, but individuals can still test fins under stress or in a crowded tank.
Predation: Not a predator toward similarly-sized community fish. The usual community caveats about mouth size still apply for very small fry or shrimp.
Territory: Not strongly territorial, but still claims a working area in the tank. Give it room to settle without overlapping the next species' patch.
Planted tanks: excellent — easy plant ideas
In the glass: typical and warning signs
- Often calm on the glass — bursts of movement around food or tank disturbance.
- Clamped fins, gasping at the surface, hiding non-stop, or refusing food after the first week.
- Rapid breathing when parameters swing — fix ammonia/nitrite first, then reassess mates.
- Low listed risk — still watch new introductions.
- Separate or rehome if injuries appear, one fish is pinned, or feeding becomes a daily chase.
- If water is stable but behaviour worsens, reduce stocking or remove the highest-impact species first.
Fish behaviour can vary between individuals and tank setups. Always observe new fish closely after introduction.
Care parameters: water, food, inverts, grouping
Chemistry and group rules sit here so you are not re-reading the same line from tank mate or temperament blocks. Swim level is in the plan grid above.
Hardness
medium-hard
Diet
herbivore
Vegetable matter, algae, and plant-based prepared foods. Long-term protein-only feeding causes bloat in herbivorous species.
Shrimp & snails
Compatible with shrimp; not safe alongside assassin snails which will pick off small nerites.
One nerite per ~20 to 30 L of grazing surface. More than that and the algae runs out and the snails starve.
Breeding behaviour depends on the species. Research before you buy a mixed-sex group of this fish.
- Hard alkaline water (pH 7.0 to 8.5, medium-hard or hard). Soft-water tanks need cuttlebone or crushed coral in the filter.
- A real lid. Nerites climb glass, silicone, and airline tubing.
- Algae or biofilm to graze. A brand new tank with no soft algae starves a nerite within weeks.
- Tank volume meets or exceeds 20L published minimum for adults.
- Heater can hold 22–28°C without cooking cooler-water tank mates.
Explore and stocking hubs
Same library as the rest of Fishori: tank-mate index for this species, category peers, guides, and litre-based stocking lists where min tank on file is within the hub volume.
Plan with tools
Pair-level rules and multi-fish stocking use the same conservative engine — add this fish in the tank builder only after mates pass pair checks.
Filtration & heating
A 20L minimum tank needs a filter rated for at least 80L/hr turnover and a heater to hold 22–28°C reliably.
Plant suggestions
Nerite Snail does well in planted tanks. Plants compatible with 22–28°C and pH 7–8.5:
Profile status: partially verified · Evidence tier: medium · 2 linked source(s). Fishori does not fabricate citations.
Fishori uses conservative planning rules based on these sources.
Confidence is explained in the summary at the top of this page (same tier as here), not repeated below.
How Fishori evaluates compatibility (same logic as pair and tank tools).
- Aquarium Co-Op. Nerite Snail Care Guide
Primary: retailer care guide covering temperature, hardness, algae diet, egg-laying behaviour, and shell-pitting in soft acidic tanks.
- Seriously Fish. Neritina natalensis (Zebra Nerite)
Secondary: species reference for natural range (East African freshwater/estuarine), confirming brackish requirement for egg viability.
Evidence notes
- Trade name 'nerite' covers half a dozen species across Neritina, Vittina, and Neripteron. Care is consistent enough across the group for a single profile, but exact shell pattern depends on which species the shop received.
- Brackish-only breeding is the consensus across hobby and biology sources. Freshwater egg capsules are dead weight that some keepers scrape off, others leave; either is fine.
- Fishori profiles work from typical aquarium trade sizes and hobby care norms. Specialist site checks and literature review for this species are not yet recorded here, so the ranges on this page are planning numbers rather than guarantees.