Cherry Shrimp
Invertebrates
The tiny, self-multiplying cleanup crew that turns one bag of shrimp into a colony!
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🤓 Did you know? Every color of cherry shrimp in the hobby, from clear to fire-engine red to jet black, is the exact same species. Neocaridina davidi's natural wild coloring is actually a dull, camouflaged greenish-brown; decades of selective breeding by hobbyists produced the entire modern color palette, right down to the graded 'Fire Red' and 'Painted Fire Red' tiers sold today.
🗓️ The first week
The numbers a new owner needs in the first week, each from the article it links to. Rows with no link come from the encyclopedia.
- Tank size
- 5 gallons is the practical minimum, 10 or larger for a self-sustaining colony, since volume buffers the small constant shifts a growing colony causes.Setup guide →
- Mature, not just cycled
- The biofilm a shrimp grazes arrives later than the bacteria that clear ammonia, so the tank has to be mature before shrimp go in. Ammonia and nitrite read zero at all times.Health guide →
- Water hardness
- The most shrimp-specific requirement: GH at least 6 degrees (about 110 ppm) and KH at least 2 (about 40 ppm), with 6 to 8 dGH, 2 to 4 dKH and pH 6.5 to 7.5 the target. Too soft and molts fail.Setup guide →
- Temperature
- 60 to 82°F, 72 to 76°F optimal, so most rooms need no heater. Add one if the room runs cooler than the high 50s or you want a stable setpoint for breeding.Setup guide →
- Filtration
- A sponge filter, or a pre-filter sponge over a standard intake, which otherwise pulls in baby shrimp. Gentle flow.Setup guide →
- Water changes
- About 10% a week or 20% every two weeks. Larger or more frequent changes shock shrimp even with clean, dechlorinated water.Health guide →
- A colony, not a few
- Ten or more to start. A pair or trio stays hidden; a colony is active, visible and confident, grazing dense plants, moss, driftwood and leaf litter all day.Enrichment guide →
- Feeding
- Mostly grazing on biofilm, with a sinking wafer a couple of times a week on top. A pea-sized piece, or a quarter wafer, feeds 10 to 20 shrimp; if the last feeding is still there, skip the next.Feeding guide →
- Leave the shed shell
- For a day or two: the colony picks it apart for the calcium. Remove it only in a tank already fighting a parasite or bacterial problem.Feeding guide →
- Molt frequency
- Adults roughly every 3 to 4 weeks, younger shrimp more often. Hiding and stillness for a few days after a molt is the shell hardening, not illness.Health guide →
- Copper
- Shrimp tolerate almost none. A 2014 study on a related shrimp found a lethal concentration of just 0.0313 mg/L, with a safe target nearer 0.003 mg/L, and it hides in fish medications, some fertilizers, and the pesticide on store-bought plants.Health guide →
- New plants
- Quarantine them in clean water for at least five days with daily water changes before they go near the shrimp tank.Health guide →
- Acclimation
- A slow drip, one drop every one to two seconds until the water volume doubles, 60 to 90 minutes. A sudden shift in pH, hardness or temperature triggers osmotic shock.Handling guide →
- Quarantine
- At least two weeks in a separate established tank before new shrimp join a colony. Some retailers hold shrimp a full 30 days before sale.Handling guide →
- Budget
- $4 to $5 a shrimp for standard grades, $6 to $8 for the deepest color. Core equipment roughly $45 to $110, and a complete first setup lands around $80 to $150. No practical vet care exists for a shrimp.Cost guide →
- Lifespan
- Up to 2 years under stable conditions, often closer to one in a typical home tank.Cost guide →
- Never release them
- A 2025 federal screening rates this species a high invasion risk across much of the US. Rehome extras through a local fish store or forum.Cost guide →
- Adult size
- Up to about 1.5 inches (4 cm).
🚨 Emergency card
Test the water first, then act on these today. No vet treats a shrimp; prevention is the whole plan.
- A complete white band around the middle of the body instead of a clean split at the head, the white ring of death
- A shrimp whose body has visibly separated from its shell
- Stillness and hiding that lasts well beyond a few days after a molt
- Sudden losses across the colony with no obvious cause
- A shrimp that looks pale or ashy
Nearly all of it traces to water stability and mineral content. A failed molt is usually fatal once it happens, so stable GH, gradual water changes, and a test kit are the leverage.
📰 Where to go next
How Much Does Cherry Shrimp Ownership Really Cost?
$4 to $8 a shrimp by grade, $45 to $110 for the tank around them, and why you never release the extras.
Cherry Shrimp Tank Setup: Size, Hard Water, and a Gentle Sponge Filter
5 gallons as a floor and 10 for a colony, the GH and KH that decide whether a molt works, and a filter intake that won't eat the babies.
Cherry Shrimp Feeding: Diet, Portions, and the Overfeeding Trap
Why a colony mostly feeds itself, a portion the size of a pea, and the shed shell you leave in the tank.
Cherry Shrimp Aren't Handled at All, But Transfers Deserve Real Care
Netting only, and why drip acclimation matters more for a shrimp than for any fish you have kept.
Common Cherry Shrimp Health Issues (And the One Chemical That Kills Them Fastest)
The white ring of death, the copper number, and the short list behind every unexplained colony die-off.
Cherry Shrimp Enrichment: Surfaces to Graze, Not Food to Add
What the decapod sentience review actually concluded, and why surface area is the whole enrichment question here.
🛒 What to buy
Prices and the reasoning behind each item are in How Much Does Cherry Shrimp Ownership Really Cost?.
❓ Frequently Asked Questions
What size tank do cherry shrimp need?
5 gallons is the commonly cited practical minimum. Shrimp can technically survive in a 2-gallon nano tank, but 10 gallons or more suits a stable breeding colony, since more water absorbs the small parameter shifts a growing colony causes.
Should I remove a shrimp's shed shell after it molts?
No, leave it in the tank for a day or two. Shrimp (including the one that just molted) eat the discarded shell to reclaim the calcium and minerals in it, which directly supports hardening the new shell underneath. The only exception is a tank dealing with a parasite or bacterial outbreak, where old shells should be removed instead.
How many should I keep?
More than a handful. Cherry shrimp are more active, more visible and more confident in a colony, and ten or more is a sensible starting point in a tank of reasonable size. A pair or trio spends most of its time hidden.
📚 Encyclopedia
Cherry Shrimp
Neocaridina davidi
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📰 Deep Dive
🦐 How Much Does Cherry Shrimp Ownership Really Cost?
🦐 Cherry Shrimp Aren't Handled at All, But Transfers Deserve Real Care
🦐 Common Cherry Shrimp Health Issues (And the One Chemical That Kills Them Fastest)
🦐 Cherry Shrimp Tank Setup: Size, Hard Water, and a Gentle Sponge Filter
🦐 Cherry Shrimp Feeding: Diet, Portions, and the Overfeeding Trap
🦐 Cherry Shrimp Enrichment: Surfaces to Graze, Not Food to Add
🩺 Health and More
🦠 How to Cycle a Fish Tank, Start to Finish: Fishless and Fish-In
🧽 Aquarium Filtration: How It Actually Works and How to Maintain It
🪣 Aquarium Water Changes: How Much, How Often, and What the Number Is For
🐟 Aquarium Stocking and Tankmates: How Many Fish, and Which Ones Go Together
🦐 Shrimp Molting: What a Normal Molt Looks Like, and the White Ring That Means It Failed
🩺 Fish Quarantine and Treatment: The Hospital Tank Guide
🤩 Fun Facts
🦐 Recycling Its Own Shell
After molting, a cherry shrimp will turn around and eat its own just-shed exoskeleton, reclaiming the calcium and minerals already locked inside it before they go to waste. Experienced keepers leave a fresh molt in the tank for a day or two rather than removing it, giving the soft new shell underneath a real head start on hardening.