Amano shrimp (Caridina multidentata) are one of the best algae-eating shrimp for freshwater aquariums. They’re peaceful, active, and perfect for planted tanks—especially if you’re new to shrimp keeping. This guide covers everything you need to know: from setup and feeding to breeding and compatible tank mates.
Amano Shrimp Overview
Native to Japan and Taiwan, Amano shrimp were popularized by aquascaper Takashi Amano for their incredible algae-cleaning ability. They have a translucent, greenish-gray body with dotted markings. While not colorful, they’re hard-working and easy to keep.
- Size: Up to 2 inches
- Lifespan: 2–3 years
- Temperament: Peaceful and active
- Difficulty: Easy to moderate
- Best For: Algae control in planted tanks
Tank Setup Tips for Amano Shrimp
Amano shrimp need clean water, stable conditions, and lots of surfaces to graze. Unlike smaller shrimp like Cherry shrimp, they’re more active and produce more waste—so they benefit from larger, better-filtered tanks.
Tank size: Start with at least 10 gallons. For groups of 5 or more, 20 gallons or larger is ideal.
Filtration & flow: Use a sponge filter to protect baby shrimp, but pair it with a hang-on-back or gentle canister filter for better water turnover. Amanos tolerate moderate current and enjoy grazing in gently flowing areas.
Hardscape & plants: Add driftwood, lava rock, or moss-covered decorations that promote algae and biofilm growth. Floating plants like Frogbit and Salvinia help diffuse light and create shady spots for grazing.
Heating: If room temperatures fall below 68°F (20°C), use a heater. Stable temperatures prevent molting issues.
👉 For a full equipment checklist, visit our Shrimp Tank Setup Guide.
Water Parameters
Keep water stable. Drip-acclimate new shrimp and avoid sudden swings.
- Temperature: 68–78°F (20–26°C)
- pH: 6.5–7.5
- GH: 6–10 dGH
- KH: 2–5 dKH
- TDS: 150–250 ppm
Tank Mates
Amanos are peaceful and thrive in calm community tanks. Great tank mates include:
- Neon or Ember Tetras
- Rasboras
- Otocinclus
- Corydoras
- Kuhli Loaches
- Nerite or Mystery Snails
Avoid aggressive or large species like:
- Goldfish
- Cichlids
- Angelfish
- Crayfish
Some Bettas may tolerate shrimp, but results vary—observe closely.
Feeding Amano Shrimp
They eat algae and biofilm naturally, but supplemental feeding is essential—especially in clean tanks.
Natural food: Soft algae, biofilm, leftover fish food, and decaying plant matter.
Supplements: Feed 2–3 times per week with algae wafers, shrimp pellets, blanched spinach or zucchini, and occasional bloodworms or protein treats.
Feed only what they can eat in a few hours. Remove leftovers to prevent ammonia spikes.
Behavior & Molting
Amano shrimp are constantly on the move, grazing tank walls, plants, and substrate. They’re more confident in groups.
Before molting, they may hide and move less. Afterward, you’ll find a clear molt shell—don’t remove it too soon, as they’ll often eat it to recover calcium.
Molting issues are usually linked to unstable water parameters or low mineral content. Keep GH and KH within the recommended range and avoid big water changes during molts.
Breeding Amano Shrimp
Breeding them at home is difficult. While females carry eggs in freshwater, the larvae require brackish water to survive. They hatch into planktonic larvae—not mini shrimp like Cherries.
To breed successfully, you’d need a separate brackish tank, controlled light, and food for larvae. Most hobbyists skip this step and buy Amanos from breeders or stores.
Lifespan & Health
With proper care, Amanos can live 2–3 years. Healthy shrimp are active, curious, and molt regularly.
Watch for signs of trouble:
- Constant hiding
- Loss of appetite
- Pale or discolored bodies
- Unusual swimming or failed molts
Avoid copper medications, acclimate new shrimp slowly, and always use a lid—they’re known to climb and sometimes jump out.
FAQ
Why is my Amano shrimp not eating?
It’s common after a molt or during water parameter changes. Make sure GH, KH, and temperature are stable, and offer a variety of foods like algae wafers and blanched veggies. Stress or illness can also cause loss of appetite.
Why is my Amano shrimp turning white?
Shrimp may appear pale due to stress, old age, or poor water conditions. If it happens suddenly, test your water for ammonia and nitrates. Ensure molting support with a calcium-rich diet and stable GH/KH.
How big do Amano shrimp get?
Up to 2 inches (5 cm).
Can Amanos live with Cherry shrimp?
Yes. They’re peaceful and cohabitate well if there’s enough space and food.
Do they eat algae and leftover food?
Yes. They clean algae, graze on biofilm, and pick up leftover flakes.
How many should I keep?
3–5 minimum for group activity and less stress.
Do they need live plants?
Not required, but helpful for grazing and shelter.
How to spot a healthy shrimp?
Look for active foraging, clean molts, quick feeding response, and natural coloring.
