Last Updated: May 21, 2026
No piece of aquarium equipment replaces a well-chosen cleanup crew — the invertebrates that work constantly to consume algae, break down detritus, aerate substrate, and process the organic waste that filters can only partially address. Nerite snails graze biofilm from glass and hardscape with mechanical precision; Malaysian trumpet snails turn substrate and prevent anaerobic pockets; Amano shrimp hunt down hair algae with relentless efficiency. The best cleanup crews are species-matched to the tank’s specific problems and livestock — there’s no single magic combination that works universally. Here’s what each major player actually does, and how to build a crew that functions as a genuine maintenance tool.
Quick Picks: Best Cleanup Crew Options for Freshwater Tanks
Amano Shrimp (Caridina multidentata)
- Most effective algae-eating shrimp available — targets hair algae
- Peaceful, large enough to coexist with most community fish
- Fascinating behavior — active and visible during the day
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Nerite Snails (Neritina spp.)
- Unmatched algae grazing on glass, rocks, and driftwood
- Cannot breed in freshwater — population stays controlled
- Multiple striking shell pattern varieties available
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Malaysian Trumpet Snails (Melanoides tuberculata)
- Aerates and turns substrate to prevent compaction
- Self-regulating population tied to food availability
- Inexpensive and freely available from hobbyist trades
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Why Trust Our Picks
We’ve maintained cleanup crews across planted tanks, community fish setups, biotopes, and shrimp-only tanks for years — tracking real-world algae control performance, compatibility with fish and plant species, population behavior, and long-term survivability. Invertebrate care is often underrepresented in mainstream aquarium coverage; we treat cleanup crew selection with the same seriousness as equipment choices, because getting it right makes measurable difference in tank health.
Individual Species Reviews
1. Amano Shrimp (Caridina multidentata) — Best Overall
Takashi Amano popularized these shrimp in the aquascaping world — naming them after himself was perhaps immodest, but their performance justifies the tribute. Amano shrimp are the most effective algae-eating shrimp available to hobbyists, with a particular affinity for the problematic algae types that other invertebrates ignore: hair algae, thread algae, and staghorn algae — the bane of planted tank keepers everywhere. At 1.5–2 inches as adults, they’re large enough to avoid predation by most peaceful community fish and bold enough to graze openly during daylight hours. They don’t breed in freshwater (larvae require brackish conditions), so populations remain controlled — add the number you need and that’s what you’ll have.
- Pros: Superior algae control especially on hair and thread algae, non-breeding in freshwater, large and visible, compatible with most community fish, fascinating behavioral repertoire
- Cons: Sensitive to copper (fatal even in trace amounts — check fertilizers), require stable water parameters, vulnerable to aggressive or predatory fish, higher price than dwarf shrimp
2. Nerite Snails (Neritina spp.) — Runner-Up
Nerite snails do one thing and they do it extraordinarily well: they graze algae from hard surfaces with mechanical, tireless efficiency. Glass panels, rocks, driftwood surfaces, filter intake tubes — every hard surface in the tank that develops green spot algae or diatoms gets addressed by a nerite before it becomes a problem. The population control advantage is significant: nerites lay eggs in freshwater but require brackish or marine conditions to hatch — meaning your tank will never have a snail population explosion regardless of how long you keep them. Available in a range of shell patterns (zebra, tiger, olive, horned), they’re also among the more attractive snails for planted tank aesthetics.
- Pros: Excellent hard-surface algae grazing, population cannot explode in freshwater, multiple attractive varieties, peaceful with all tank inhabitants, long-lived (2–3 years)
- Cons: Lay unsightly white eggs on hard surfaces (won’t hatch, but cosmetically annoying), can escape from open-top tanks — check lids; won’t address floating or substrate algae
3. Otocinclus Catfish (Otocinclus spp.) — Best for Diatom and Soft Algae
Otocinclus — “otos” to the aquarium community — are the dedicated soft algae specialists that nerites can’t quite match on plant leaves and delicate surfaces. Their small mouths and gentle scraping action removes brown diatoms and soft green algae from broad-leaved plants without damaging the leaf itself — a critical distinction for planted tank keepers who don’t want their Anubias leaves looking like they’ve been sandpapered. They’re schooling fish that need to be kept in groups of at least six, and they have a notorious sensitivity period immediately after import — quarantining before adding to a display tank is strongly recommended. Once established, they’re hardy and long-lived.
- Pros: Excellent soft algae removal from plant leaves, peaceful and compatible with most community species including shrimp, entertaining schooling behavior
- Cons: High mortality rate immediately post-import — quarantine essential, must be kept in groups of 6+, not suitable for tanks without established plant growth (need biofilm to graze), won’t address hair algae or green spot algae
4. Malaysian Trumpet Snails — Best Budget / Substrate Specialist
Malaysian trumpet snails (MTS) have an undeserved reputation as pests — usually earned by hobbyists who let them overpopulate through overfeeding rather than through any fault of the snails themselves. In appropriate numbers, they perform a genuinely useful function that no other cleanup crew member replicates: burrowing through substrate, aerating it, preventing compaction, and consuming decaying organic matter before it creates anaerobic pockets that produce hydrogen sulfide. For planted tanks with fine substrate (Aqua Soil, sand-based substrates), MTS are arguably essential. Their population is entirely self-regulating based on food availability — keep the tank clean and well-maintained and populations stay manageable.
- Pros: Unique substrate-aeration function, population self-regulates with food availability, inexpensive or free from hobbyist networks, nocturnal so rarely seen during the day
- Cons: Can overpopulate if tank is consistently overfed, some fish (puffers, certain loaches) will devastate the population; mostly invisible — less visually interesting than shrimp or nerites
Buyer’s Guide: Building an Effective Cleanup Crew
Match the crew to the problem, not to a generic recommendation. Green spot algae on glass — nerite snails. Hair and thread algae in plants — Amano shrimp. Brown diatoms on plant leaves — otocinclus catfish. Substrate compaction and detritus accumulation — Malaysian trumpet snails. No single species handles all of these, and many hobbyists run two or three complementary species simultaneously for comprehensive coverage.
Copper is the silent killer of invertebrate crews. Many plant fertilizers — particularly cheaper formulations — contain copper sulfate as a micronutrient. At concentrations safe for fish, copper is lethal to shrimp and can harm snails. Always check your fertilizer’s copper content before adding any invertebrate cleanup crew, and use invertebrate-safe fertilizers (Seachem Flourish Comprehensive, for example, has a safe copper level for established shrimp tanks).
Cleanup crews are not a substitute for maintenance. This is perhaps the most important point: invertebrate cleanup crews reduce maintenance load, they don’t eliminate it. Overstocking with cleanup crew in an attempt to solve fundamental problems (overfeeding, inadequate filtration, insufficient water changes) produces a snail population explosion rather than a clean tank. Address root causes first, then deploy cleanup crew as a supplementary tool.
Frequently Asked Questions
How many Amano shrimp do I need per gallon?
A general guideline is 1–2 Amano shrimp per 5 gallons for maintenance, scaling up to 1 per 2 gallons for active algae remediation. For a 20-gallon planted tank with a hair algae problem, starting with 10–15 Amano shrimp provides meaningful grazing pressure. Reduce population (rehome, or allow natural attrition) once algae is under control.
Will nerite snails eat my aquatic plants?
No — nerites exclusively graze algae and biofilm from hard surfaces. They will not damage living plant tissue. If you observe a nerite on a plant leaf, it’s grazing algae or biofilm from the leaf surface, not consuming the plant itself. They’re one of the most plant-safe invertebrates available.
Can I keep shrimp with community fish?
It depends on fish size and species. Amano shrimp (1.5–2 inches) coexist safely with small peaceful species: tetras, rasboras, corydoras, small danios, and most livebearers. Avoid keeping shrimp with fish large enough to eat them (cichlids, large gouramis, rainbow fish, most catfish). Dense planting provides refuge for smaller dwarf shrimp (Neocaridina, Caridina) species but they remain vulnerable to any fish with a mouth large enough to consume them.
Why are my snails dying?
The most common causes: copper in fertilizers or medications, insufficient calcium for shell development (particularly in soft-water tanks — supplement with crushed coral or cuttlebone), inadequate food (in a heavily cleaned tank with little algae or biofilm, snails can starve — supplement with blanched vegetables), or sudden parameter swings during acclimation. Nerites are particularly sensitive to salinity changes during transport.
Do cleanup crew members need to be fed separately?
In a mature planted tank with sufficient biofilm and algae growth, most cleanup crew feed themselves adequately. In very clean, heavily maintained tanks, supplement with blanched zucchini, spinach, or algae wafers for snails; high-quality sinking pellets or biofilm tabs for shrimp. Amano shrimp in particular are opportunistic omnivores and readily accept supplemental feeding when algae is limited.
Final Verdict
For planted tank hobbyists dealing with the most common algae problems, the foundational crew is simple: Amano shrimp for hair and thread algae, Nerite snails for glass and hardscape grazing, and Otocinclus catfish for diatoms on plant leaves — these three together address nearly every routine algae concern in a planted tank. Add Malaysian trumpet snails if you’re running a fine-substrate planted tank and want passive substrate maintenance without effort. Build your crew around the specific problems your tank presents, keep copper out of your fertilizer regimen, and you’ll find that the tank largely manages its own cosmetic cleanliness — leaving your maintenance time for the enjoyable parts of the hobby.
