Amano Shrimp Care Guide (2026)

Amano Shrimp Care Guide (2026)

Amano Shrimp (Caridina multidentata, formerly C. japonica) are among the most effective algae-grazing shrimp commonly kept in planted aquariums. Larger, more robust, and more assertive than Cherry Shrimp, they are a staple in planted tanks and a practical tool for managing algae that smaller shrimp cannot address. They are also peaceful, long-lived, and compatible with a wide range of community fish.

Species Overview

  • Scientific name: Caridina multidentata
  • Adult size: 1.5–2 inches; females larger than males
  • Lifespan: 2–3 years, sometimes longer in optimal conditions
  • Temperament: Peaceful; active and visible compared to smaller shrimp
  • Difficulty: Beginner to intermediate

Tank Size

A minimum of 10 gallons for a small group. Keep Amano Shrimp in groups when possible. A group of 5–10 is common in medium planted aquariums, with the appropriate number depending on tank size, available food, and overall stocking.

→ Best Freshwater Aquarium Tanks

Water Parameters

  • Temperature: 65–78°F (18–26°C)
  • pH: 6.5–7.5
  • GH: 6–10
  • KH: 2–6
  • TDS: 150–250 ppm
  • Ammonia/Nitrite: 0 ppm at all times
  • Nitrate: Keep below 20 ppm

Amano Shrimp are more adaptable than soft-water Caridina species and tolerate a wider parameter range. Most tap water sources fall within their requirements. Test before setup and adjust if needed.

→ Best Aquarium Test Kits | Best Shrimp Remineralizers & GH/KH Minerals

Algae Control

Amano Shrimp are among the most effective algae-grazing shrimp commonly kept in planted aquariums. Their impact depends on the type and amount of algae present, group size, and availability of other foods. They are particularly active against thread algae and hair algae. They are less effective against established black beard algae (BBA), though they will graze on it — for BBA, address the underlying cause (CO2 fluctuation, excess nutrients) rather than relying on shrimp alone.

Filtration

Amano Shrimp are larger than most dwarf shrimp and less vulnerable to standard filter intakes, but a pre-filter sponge over HOB and canister intakes is still good practice, particularly in tanks with molting adults. Sponge filters work well in smaller dedicated setups.

→ Best Sponge Filters for Shrimp Tanks | Best Aquarium Filters

Substrate

Inert substrate is appropriate for Amano Shrimp. They do not require the soft, acidic conditions of bee shrimp and are compatible with most standard aquarium substrates. Fine-grained substrate supports biofilm development, which Amanos graze on between algae meals.

→ Best Substrate for Shrimp Tanks

Feeding

In a tank with algae and established biofilm, Amano Shrimp largely feed themselves. Supplement with shrimp-specific pellets, blanched vegetables, or snowflake food when algae is limited. Avoid overfeeding prepared foods — well-fed shrimp will preferentially eat prepared food over algae. They are more assertive feeders than Cherry Shrimp and will compete effectively at feeding time in a community tank.

→ Best Shrimp Food

Molting

Amano Shrimp molt regularly, becoming temporarily soft-bodied and vulnerable. Leave shed exoskeletons in the tank. Molting problems can be associated with unsuitable or unstable water chemistry — maintain stable parameters and avoid large, rapid water changes.

→ Freshwater Shrimp Molting Guide

Breeding

Amano Shrimp do not complete their life cycle entirely in freshwater. Females may carry eggs in a freshwater aquarium, but the newly hatched larvae require a separate brackish-water rearing process before the juveniles can be transitioned back to freshwater. This makes breeding considerably more difficult than breeding Cherry Shrimp, and it is not commonly attempted in home aquariums. Replace losses by purchasing new shrimp.

Where to Find Amano Shrimp

Ready to add a cleanup crew? The Shrimp Farm carries Amano Shrimp — a straightforward way to get healthy shrimp shipped to your door once your tank is established.

Browse Amano Shrimp at The Shrimp Farm →

Disclosure: HabitatCraft participates in The Shrimp Farm affiliate program and may earn a commission from purchases made through this link, at no extra cost to you.

Tankmates

Amano Shrimp are compatible with most community fish. Their larger size makes them less vulnerable to being eaten than dwarf shrimp, though large or aggressive fish will still prey on them. Avoid large cichlids and any fish with a mouth large enough to swallow a 2-inch shrimp. They are safe with Cherry Shrimp, snails, and other peaceful invertebrates.

→ Freshwater Shrimp Tankmates Guide

Common Issues

  • Shrimp not eating algae: Usually a sign the tank is well-fed and shrimp are eating prepared foods instead. Avoid overfeeding prepared foods to encourage algae grazing.
  • Shrimp dying after introduction: Most commonly caused by acclimation shock or poor water quality. Acclimate carefully while minimizing sudden changes in temperature and water chemistry, and test parameters before adding new shrimp.
  • Molting problems: Can be associated with unsuitable GH or parameter instability. Test water chemistry.

→ Freshwater Shrimp Dying: Causes & Solutions

Equipment Summary

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