Neocaridina davidi mix

Choose this mixed-colour freshwater shrimp for a mature aquarium

The Neocaridina davidi mix (Neocaridina davidi) is a small freshwater shrimp in the family Atyidae. It is native to Taiwan, east of China, the Korean Peninsula and Vietnam, where the species lives in lakes, ponds, rivers and streams. Mature shrimp are approximately 3–4 cm long, so plan for an adult size of about 4 cm rather than judging space from the smaller shrimp supplied.

WoRMS lists Neocaridina davidi as an accepted Atyidae species. In the wild, Neocaridina davidi is an omnivore. The wild type is mottled brown, while selective breeding has produced red, orange, yellow, green, blue, violet, white and clear colour forms. A mixed-colour group may therefore contain visibly different shrimp while sharing the same basic care needs.

This is an intermediate-care animal for keepers prepared to measure water quality, maintain mature biological filtration and manage feeding carefully. Its peaceful behaviour and small size can work well in a planted shrimp display, but small does not mean maintenance-free. Shrimp are invertebrates, react badly to ammonia and nitrite, and need established grazing surfaces, shelter and a protected filter inlet.

Decide from the aquarium, not the shrimp's dispatch size

Understand the animal supplied before planning the group

One purchase supplies one live shrimp. The shrimp is supplied at 1–2 cm, which is its size when dispatched rather than its eventual adult length. Build the aquarium around an adult size of about 4 cm, the complete starting group, equipment displacement, companions and the possibility that juveniles may later survive.

Sex is guaranteed only when the selected option explicitly states male or female. This Neocaridina davidi mix listing has no sex-guaranteed option. Colour does not show sex, maturity or breeding condition, so plan the purchase as an unsexed mixed-colour shrimp rather than as a breeding group.

The gallery images are representative of this type of animal rather than photographs of the exact animal supplied, so colours can look slightly different from the live animal. Mixed shrimp may differ in colour and pattern, and selective breeding has produced many forms within Neocaridina davidi. Appearance can also look different under another light, against another substrate or during a period of stress.

Plan the whole group before adding livestock

• Start with measured water: confirm that ammonia and nitrite are both zero and that temperature, pH and hardness are stable.
• Reserve real space: use the aquarium's working volume after substrate, wood, plants and equipment have displaced water.
• Protect small shrimp: cover any filter inlet capable of drawing in a 1–2 cm shrimp or a much smaller juvenile.
• Provide mature surfaces: plants, aquarium-safe wood, rock and other structure create shelter and places where grazing growth can establish.
• Screen every companion: check adult mouth size, hunting behaviour, territorial behaviour, feeding competition and shared water requirements.

Use the complete Cherry Shrimp Care Guide for deeper setup and lifecycle planning. If you are comparing colour forms rather than building a mixed display, you can also browse the cherry shrimp collection. Keep colour choice separate from welfare decisions: filtration, stable water, suitable food and safe companions remain the priorities for every form.

Keep water stable within the shrimp planning range

Keep the aquarium at 17–27°C, pH 6.5–8.0 and 4–18 dGH, with ammonia and nitrite at zero. OATA's freshwater shrimp guidance gives these as group-level planning values rather than a species-specific optimum. It also gives 3–15 dKH and says nitrate should not rise more than 20 mg per litre above the normal tap-water level.

Choose a stable point within those ranges that also suits every other aquarium inhabitant. A reading inside the range is only one part of the decision: the shrimp still need mature filtration, gradual change and zero measured ammonia and nitrite. Test the aquarium itself because substrate, rock, top-up water, treatments and biological activity can change values after tap water enters the tank.

Use measured values to make each decision

A heater is a tool, not an automatic requirement. Use a correctly sized, guarded and thermostatically controlled heater when measured room and aquarium temperatures cannot remain stable within the chosen range. In a warm room, plan against overheating instead of adding heat by habit.

Read our guide to understanding aquarium water chemistry before changing hardness or pH. The water matcher can help compare measured aquarium values with the stated planning range. Make one controlled adjustment at a time so a later test can show what changed.

Start with mature filtration, a social group and enough space

Start with a mature, filtered 20-litre aquarium for a small group. This is Tropical Fish Co's cautious planning policy; OATA gives 10 litres as a general screen for small freshwater shrimp. The larger starting volume provides more headroom for equipment, feeding mistakes, maintenance and temperature change. Plan larger whenever fish or other livestock share the aquarium.

Keep at least five shrimp together. OATA's guidance says social shrimp should generally be maintained in groups of at least five, but that number is not a permanent capacity formula. Aquarium volume cannot be converted into a reliable shrimp-per-litre allowance because filtration, footprint, grazing area, food access, oxygen, companions and possible population growth all affect capacity.

Confirm biological maturity before stocking

A mature aquarium is one whose biological filter can process the planned waste load while tests continue to show zero ammonia and zero nitrite. It is not defined by waiting a fixed number of days. The RSPCA explains how biological filtration converts toxic ammonia through nitrite to safer nitrate, while OATA's freshwater aquarium guidance supports cycling, testing and gradual stocking.

1. Run the complete filter, heater if required, substrate and decor as the finished system.
2. Confirm with tests that ammonia and nitrite remain at zero.
3. Use the real water volume after substrate, wood, rock and equipment displacement.
4. Reserve sheltered feeding and grazing areas that every shrimp can reach.
5. Add livestock gradually so the bacterial population can adjust to increased waste and feeding.
6. Leave capacity for all adult companions and any juveniles that survive.

If the aquarium is new, follow our guide to preparing and maturing a shrimp aquarium before livestock arrives. A small tank can meet the stated volume while still failing through immature filtration, unstable temperature or too little usable shelter, so judge the complete system rather than litres alone.

Build cover, grazing space and safe water flow

Provide aquarium-safe plants, wood, rock or other structure with sheltered surfaces. These features give shrimp places to graze, rest and withdraw around moulting. Fine gravel or sand can form the base, while planted or structured areas increase the usable surface available to the group.

Protect every filter inlet that could trap a shrimp or juvenile. A fine guard or suitable sponge can reduce that risk without replacing routine filter checks. Keep the guard accessible because trapped debris can reduce flow; inspect it during normal maintenance and clear blockages before circulation is affected.

Arrange the aquarium around shrimp behaviour

• Established surfaces: include mature plants, wood, rock or decor where biofilm and soft growth can develop.
• Dense shelter: create protected areas that remain useful after plants are trimmed.
• Visible feeding access: leave a place where you can check whether every shrimp reaches suitable food.
• Safe equipment: shield intakes and position equipment so animals cannot become trapped.
• Maintenance access: leave enough room to siphon debris, inspect the filter and remove recurring food waste.
• Secure boundaries: use a suitable cover while preserving safe ventilation and cable routes.

Biofilm is useful grazing material, especially for small shrimp, but an old-looking surface is not proof that an aquarium is biologically safe. Test ammonia and nitrite, confirm the filter is processing waste and provide an appropriate complete shrimp food. Mature surfaces support feeding opportunities; they do not replace nutrition or water-quality control.

Balance shelter with inspection. If every surface becomes inaccessible, waste and uneaten food can collect unseen and filter guards become difficult to service. A practical layout gives the shrimp multiple covered routes while still letting you observe activity, colour, feeding and moulting. Check that each refuge remains usable after maintenance rather than assuming a heavily planted aquarium will always provide the same cover.

With fish present, increase both space and refuge while keeping expectations realistic. Cover may reduce encounters, but it cannot make a predator safe or prevent a fish from taking newly hatched juveniles. Use the physical layout as one layer of risk management after screening the companions themselves.

Feed an omnivorous shrimp without fouling the water

Use an appropriate complete sinking shrimp food as the nutritional base, following its current feeding directions and adjusting the portion from observation. Neocaridina davidi is an omnivore and also grazes biofilm and some soft growth, but grazing alone does not make a complete household feeding plan.

Place food where the group can reach it without being continually displaced by faster companions. OATA advises allowing at least 30 minutes for shrimp to feed on pellets or wafers. Watch the animals during that period, then remove recurring excess before it breaks down and adds waste to the water.

Judge the next portion from what happened to the last one

Suitable variety can complement a complete shrimp food, but every addition still contributes to the aquarium's waste load. Do not assume the group will live indefinitely on nuisance algae, and do not use shrimp as a guaranteed solution for a named algae problem. Their grazing depends on the surfaces and growth actually present.

Colour is not a feeding gauge on its own. Selective breeding, lighting, substrate, stress, health and the way an image was made can all affect how colour appears. If shrimp become pale, inactive or uninterested in food, check water and equipment before automatically adding colour-enhancing products.

A practical routine is to feed a measured small portion, observe access, allow feeding time and record whether excess remains. That sequence gives you a reason for the next adjustment. Repeatedly adding food because shrimp are still grazing can lead to decay, while reducing food without checking access can leave shy animals competing unsuccessfully.

Maintain the aquarium with regular measured changes

Change 25% of the water at least once each week and test the aquarium at least weekly. OATA strongly recommends this routine for freshwater shrimp and snails, with ammonia and nitrite kept at zero. Treat replacement tap water with a suitable conditioner before it enters the aquarium so chlorine or chloramine does not damage livestock or filter bacteria.

Use each maintenance session to remove visible solid waste and recurring uneaten food, inspect water flow and check the protected filter inlet. Siphon carefully around small shrimp and sheltered areas. The aim is to remove waste without stripping away every established grazing surface or making several abrupt changes at once.

Protect the biological filter while cleaning

1. Measure temperature and test ammonia and nitrite before making a diagnosis from behaviour alone.
2. Remove the planned volume of aquarium water into a clean container used for aquarium work.
3. When cleaning is needed, rinse dirty filter media lightly in that removed aquarium water, never under the tap, because chlorine or chloramine in tap water can kill the filter bacteria.
4. Check the intake guard and restore normal flow without leaving gaps that could trap shrimp.
5. Condition the replacement water and avoid abrupt temperature or chemistry changes.
6. Retest when a previous reading was abnormal or livestock behaviour remains changed.

Keep a short record of temperature, ammonia, nitrite, nitrate, pH and hardness. Trends are more useful than isolated readings because they show whether feeding, population growth or reduced filter flow is gradually changing the aquarium. If nitrate rises after each week despite water changes, review the amount of food, trapped debris, livestock load and maintenance effectiveness.

Stock gradually. Each added animal and every increase in feeding creates more waste for the bacterial population to process. Adding too much livestock quickly can lead to new tank syndrome, with ammonia or nitrite rising before filtration catches up.

Stability does not mean leaving the aquarium untouched. It means using a consistent testing and maintenance routine that catches change early. Weekly checks create a baseline for normal behaviour and water values, making an unusual reading, reduced feeding response or equipment problem easier to recognise before it becomes severe.

Plan for adult growth, moulting and health changes

Plan for an adult length of about 4 cm. Mature Neocaridina davidi are approximately 3–4 cm long, so size the aquarium, shelter and companion checks for the larger end of that range.

An empty exoskeleton can resemble a dead shrimp, and hiding may accompany moulting. Neither sign alone identifies a health problem. Observe the whole animal and group, then check measured water and equipment before deciding what has happened.

Respond to a change in a fixed order

1. Measure: check temperature, ammonia and nitrite immediately, then review nitrate, pH and hardness in context.
2. Inspect equipment: confirm filtration, water flow, heating and the intake guard are operating normally.
3. Review recent changes: consider maintenance, food, new animals, plants, decor, aerosols and treatments.
4. Compare the group: note whether one shrimp or several show reduced activity, unusual swimming, colour change, swelling, lesions, exoskeleton damage, lost appendages or reduced feeding.
5. Escalate serious signs: seek suitably qualified aquatic or veterinary help when changes persist or are severe.

Freshwater shrimp are very sensitive to copper and will die if exposed even to low levels, so make sure any treatment added to the aquarium is safe for invertebrates. Before using any medicine or chemical, identify the problem, read the exact current label and follow every invertebrate warning.

Avoid changing temperature, pH, hardness, food and medication simultaneously. Multiple changes make it difficult to identify the cause and can add further stress. Record clear observations and test results, correct any immediate water-quality or equipment fault, then monitor the response.

Judge long-term care from the continuing condition of the aquarium. Lineage, temperature, food, water quality, predation and other conditions can affect survival. The practical commitment is ongoing mature filtration, appropriate food, safe equipment and prompt action when behaviour or appearance changes.

Follow the arrival procedure step by step

Tropical Fish Co hand-packs livestock in oxygenated bags inside an insulated box and adds a heat pack when weather conditions call for it. Transport is handled by a licensed live-animal courier, with tracking and the confirmed arrival date sent by email, so arrange for someone to receive the parcel because live animals must not be left unattended.

When the parcel arrives

1. Start a short unboxing video before opening every parcel, and open it on the day it arrives. Show the parcel still sealed with the outer box visible, then record the parcel being opened in one continuous take and the shrimp still inside the sealed bag before anything is disturbed.
2. Float the bag for 20–30 minutes before releasing the shrimp.
3. Never pour the bag water into the aquarium.

Before ordering, read the current delivery and Live Arrival Guarantee policy for the complete claim requirements.

OATA's freshwater shrimp guidance says to confirm zero ammonia and nitrite and suitable water conditions before adding livestock. Prepare the mature aquarium and stabilise its temperature, pH and hardness before the journey takes place because acclimatisation cannot correct an immature filter or an unsuitable destination aquarium.

After release, use the established health routine rather than making several immediate changes. Check measured water, filter operation and the condition of the group if activity, colour, posture or feeding response causes concern. Keeping a clear record of the arrival condition and aquarium readings makes later assessment more reliable.

Screen every fish before mixing it with shrimp

Avoid fish able to fit the shrimp in their mouth and species known to be predatory. No fish is guaranteed safe with adult shrimp, and the risk is greater for newly hatched juveniles, so a general label such as peaceful or community fish is not enough to approve a pairing.

Assess the companion at its adult size, not the size seen in a shop or juvenile aquarium. Check hunting behaviour, territorial behaviour, feeding speed and whether it searches through the exact plants and shelters the shrimp use. A fish that ignores an adult shrimp may still consume much smaller juveniles.

Use the same screening order for every proposed companion

Dense planting and structure can reduce encounters, but cover does not turn a predator into a safe companion. Recheck the layout after trimming plants or moving decor because a refuge can disappear even when the livestock remains unchanged.

A shrimp-only aquarium removes fish predation and feeding competition from fish. It does not remove water-quality, food, equipment, crowding or health risks, so continue the same testing and maintenance routine. If display coexistence is the goal, accept that seeing adults together is not proof that tiny juveniles will survive. If maximum colony survival is the goal, a shrimp-only setup is the clearer plan.

Manage possible colony growth

Decide whether you want a mixed-colour display or a line intended to preserve one named colour. Neocaridina davidi has been selectively bred into many colour forms, and offspring from a mixed group may not keep each parent's appearance. If colour consistency matters, keep that objective separate from the welfare plan and use a single documented colour line.

Females carry eggs externally beneath the abdomen. Development is direct or abbreviated, so young hatch as benthic juveniles rather than passing through the prolonged saline planktonic phase associated with Amano Shrimp. This biology can make juvenile survival possible in freshwater, but a colony may still not grow.

Plan for both outcomes

• If no juveniles appear: maintain the existing group without diagnosing sex, maturity or fertility from colour or body size.
• If juveniles appear: reassess intake protection, mature grazing surfaces, food access, filtration load and working aquarium volume.
• If fish share the aquarium: expect predation risk even when adults appear to coexist peacefully.
• If numbers increase: do not apply a fixed shrimp-per-litre ratio; judge filtration, oxygen, feeding area, water trends and the full community.
• If preserving colour matters: keep a single colour line rather than a mixed-colour group.

Population growth increases both feeding demand and waste production. Watch whether food disappears because more shrimp are eating it or because fish are taking it, and track ammonia, nitrite and nitrate rather than increasing portions automatically. Any rise in ammonia or nitrite requires immediate attention to filtration, waste and stocking.

Have a separation plan before a compatibility problem develops. Behaviour can change as fish mature, territories form, cover is trimmed or feeding competition increases. A backup mature aquarium is more useful than relying on a last-minute container with no established filtration.

The best compatibility decision follows the intended outcome. A mixed display may accept some juvenile loss, while a colony project places greater weight on shrimp-only housing, protected intakes and dense cover. Both still require stable water, suitable food and enough capacity for the animals that survive.

Answer common keeper questions before purchase

How big does Neocaridina davidi mix get?

It reaches about 4 cm; mature Neocaridina davidi are approximately 3–4 cm long, so use 4 cm for aquarium and companion planning.

What size aquarium does Neocaridina davidi mix need?

Tropical Fish Co uses a mature, filtered 20-litre aquarium as a cautious starting policy for a small group; plan larger when fish or other livestock share the aquarium.

How many Neocaridina davidi mix shrimp should I keep together?

OATA's freshwater shrimp guidance says social shrimp should be kept in groups of at least five; this is a starting group, not a permanent shrimp-per-litre formula.

Does Neocaridina davidi mix suit beginners?

It has an intermediate care rating and suits keepers ready to maintain mature filtration, test water weekly, protect the filter inlet and control food waste.

What does Neocaridina davidi mix eat?

It is an omnivore that grazes biofilm and soft growth; use an appropriate complete sinking shrimp food as the nutritional base and remove recurring excess.

What temperature and pH does this shrimp need?

Keep it at 17–27°C and pH 6.5–8.0, with 4–18 dGH; OATA gives these as broad freshwater shrimp planning values, with ammonia and nitrite at zero.

Is it aggressive or does it nip fins?

No, it is a peaceful shrimp. The main compatibility risk is predation by fish able to fit the shrimp in their mouth or species known to be predatory.

Which animals can it live with?

A shrimp-only aquarium removes fish predation; with fish, proceed only after checking adult mouth size, hunting, territorial behaviour, food competition and shared water requirements.

How does it arrive alive in the UK?

Start filming every delivery before opening the parcel, and open it on the day it arrives. Tropical Fish Co hand-bags the shrimp in oxygen inside an insulated box, adding a heat pack when weather calls for it; someone must receive the parcel, float the bag for 20–30 minutes and never pour the bag water into the aquarium.

Check the identity and welfare references

• WoRMS: accepted scientific name and Atyidae family placement.
• Wikipedia: native range, freshwater habitats, omnivorous natural history, colour forms and mature length.
• OATA freshwater shrimp and snail guidance: water, social grouping, aquarium setup, feeding, maintenance and compatibility.
• RSPCA aquarium welfare guidance: biological filtration and waste processing.
• OATA freshwater aquarium guidance: cycling, testing and gradual stocking principles.