Cherry shrimp and Kuhli loach
Can these two share a tank? The assessment below is derived from stored behavioural and environmental traits, not from a compatibility chart.
Can work, but only if the stated conditions are met.
- Minimum volume
- 105 L
- Minimum length
- 90 cm
- Factors considered
- 8
Concerns
The shared band 24–27 °C sits at the top of one animal's range, so that animal is permanently at its limit even though the overlap looks generous. The overlap sits at the extreme of at least one animal's range, so that animal is permanently at its limit. A non-empty overlap is not the same as a suitable one.
Derived from: environment.temperature range position on both records
Adult shrimp should be safe, but Kuhli loach will eat shrimplets. Expect the colony to hold steady rather than grow.
Derived from: traits.predation.shrimplets
Both species occupy the bottom of the tank, so allow for the shared space when judging the footprint.
Derived from: zone and traits.activity on both records
Why it can work
- pH requirements overlap at 6.5–7.5.
- Hardness requirements overlap at 6–10 °dGH.
- Cherry shrimp needs a group of at least 10. Kept in smaller numbers it is not simply lonely — shoaling species held below their threshold show chronic stress behaviour, colour loss and, in several species, increased aggression towards tankmates.
- Kuhli loach needs a group of at least 6. Kept in smaller numbers it is not simply lonely — shoaling species held below their threshold show chronic stress behaviour, colour loss and, in several species, increased aggression towards tankmates.
- Kuhli loach is active mainly after dark, so the two overlap less than the stocking list suggests. Feed the nocturnal animal after lights-out or it will be outcompeted.
Conditions
Most interesting pairings are conditional on something. These are the things the keeper can actually change.
- Dense moss or leaf litter if you want the shrimp colony to increase in number
- At least 10 Cherry shrimp, counted as one group
- At least 6 Kuhli loach, counted as one group
- At least 105 L with a footprint of 90 cm or more, before counting anything else in the tank
Derived, or documented?
These are different claims and are shown separately. The verdict above is derived from stored traits — arithmetic on AquariumHQ's own records. Whether the pairing is actually reported to work is a separate question, and for most pairs the honest answer is that we hold nothing.
Environmental compatibility
Derived from stored traits
Temperature, pH, hardness, size and behavioural traits compared between the two records. Sound as far as it goes, and it is not evidence that the pairing works.
Behavioural evidence
Limited evidence
Some reports exist and they do not agree, or there are too few to generalise from. Read the derived assessment as the main basis.
AquariumHQ's overall position
Usually described as shrimp-safe on the strength of the loach's temperament, which is the wrong axis — the loach is a substrate-sifting invertebrate feeder and the shrimplets live in the substrate. What actually limits this pairing is that the two animals want different hardness.
What would change it: Moss and litter give shrimplets somewhere off the floor. The hardness compromise has no fix.
Factor by factor
- Shrimplet predationReported
Kuhli loaches sift substrate for small invertebrates and shrimplets are small invertebrates. Reports are mixed and thin; the mechanism is obvious and the frequency is not established.
- Adult shrimp safetyReported
Adults are not reported as being taken. A kuhli loach's mouth is not equipped for a full-grown Neocaridina.
- WaterDerived
The kuhli is a very soft-water fish and the shrimp needs hardness for moulting. The overlap is narrow and this is the more reliable problem of the two.
| Depends on | How much |
|---|---|
| Tank size and dimensions | none |
| Life stage | significant |
| The individual animal | significant |
How good is the overlap?
Whether two ranges intersect is a necessary condition, not evidence. What matters is WHERE the shared band sits: an overlap at the top of one animal's range and the bottom of the other's is a forced compromise however wide it looks, and it is the case a simple intersection test cannot see.
| Dimension | Assessment | What that means here |
|---|---|---|
| Temperature | One animal at the edge of its range | The shared band 24–27 °C sits at the top of one animal's range, so that animal is permanently at its limit even though the overlap looks generous. |
| pH | Workable | The shared band 6.5–7.5 pH is usable, though it does not sit centrally for both animals. |
| Hardness | Workable | The shared band 6–10 °dGH is usable, though it does not sit centrally for both animals. |
Factor by factor
Every factor states what it rests on. Most are derived from the traits stored on both records — sound arithmetic on AquariumHQ's own data, and not a report about how the pairing actually goes. Where a factor says 'not known', the data is missing and saying so matters, because a missing factor and a favourable one look identical once both are absent.
| Factor | Basis | Finding |
|---|---|---|
| Temperature | Derived from stored traits | One animal at the edge of its range. The shared band 24–27 °C sits at the top of one animal's range, so that animal is permanently at its limit even though the overlap looks generous. |
| pH | Derived from stored traits | Workable. The shared band 6.5–7.5 pH is usable, though it does not sit centrally for both animals. |
| Hardness | Derived from stored traits | Workable. The shared band 6–10 °dGH is usable, though it does not sit centrally for both animals. |
| Body size | Derived from stored traits | Kuhli loach reaches about 10 cm against 4 cm for Cherry shrimp — a ratio of 2.5. Size disparity drives opportunistic predation independently of temperament. |
| Predation | Evidence-backed | Highest predation risk in either direction is "none". Reported: Kuhli loaches sift substrate for small invertebrates and shrimplets are small invertebrates. Reports are mixed and thin; the mechanism is obvious and the frequency is not established. |
| Territoriality | Derived from stored traits | Neither animal holds a territory. |
| Breeding aggression | Derived from stored traits | Neither becomes notably more aggressive while spawning. |
| Fin-nipping | Derived from stored traits | No nipper-and-target combination between these two. |
| Aggression | Derived from stored traits | Strongest intraspecific aggression across the pair is "none". It bears on the pairing because a fish under pressure from its own kind redirects. |
| Social requirements | Derived from stored traits | Cherry shrimp needs at least 10; Kuhli loach needs at least 6. A shoaling species held below its threshold shows chronic stress and, in several species, increased aggression towards tankmates. |
| Group-size dependency | Derived from stored traits | The outcome depends on group size as much as on the pairing: under-grouped shoalers nip more and hide more. |
| Tank zone | Derived from stored traits | Both occupy the bottom of the tank, so the shared space is under pressure. |
| Activity level | Derived from stored traits | Activity levels are compatible. |
| Food competition | Derived from stored traits | Both are detritivores feeding in the same part of the tank. |
| Risk to shrimp and snails | Derived from stored traits | Highest risk either animal poses to dwarf shrimp or snails is "moderate". |
| Effect on plants | Derived from stored traits | Neither animal damages planting. |
| Tank dimensions | Derived from stored traits | The more demanding of the two needs at least 75 L and 60 cm of length before anything else is in the tank. Volume alone does not describe a home for a fish that swims in straight lines. |
| Life stage | Evidence-backed | Life-stage dependency: significant. Adults are not reported as being taken. A kuhli loach's mouth is not equipped for a full-grown Neocaridina. |
| Individual variation | Evidence-backed | Individual variation: significant. |
Environmental overlap
| Parameter | Shared range | Reading |
|---|---|---|
| Temperature | 24–27 °C | Aim for the middle of the shared band. |
| pH | 6.5–7.5 | Stability matters more than the exact figure. |
| Hardness | 6–10 °dGH | Check your source water before committing. |
What this assessment cannot tell you
- Individual temperament varies, particularly in cichlids and in bettas, and can override a favourable verdict for Cherry shrimp or Kuhli loach.
- The assessment is for the pair in isolation. A third species can change the outcome in either direction.
- Both animals are assessed at adult size, not at the size they are sold.
- A verdict is a statement about probability, not a guarantee.
Where the two water bands meet
Derived from the ranges AquariumHQ publishes for each species. The compatibility engine reads the same numbers; this is what they look like drawn on one axis.
Temperature (°C)
Scale: 0 to 36 °C.
pH (pH)
Scale: 4 to 9.5 pH.
Hardness (°dGH)
Scale: 0 to 30 °dGH.
Why the bands sit where they do
The overlap above is arithmetic. This is where the two numbers came from — the kind of water each animal is recorded from, and how much room that leaves.
These two animals come from different kinds of water, and that is where the arithmetic below comes from rather than from anything about their temperaments.
Cherry shrimp
Subtropical stream
100–500 µS/cm · moderate flow · near saturation oxygen
Kuhli loach
Soft forest stream
20–120 µS/cm · low flow · moderate oxygen
- TemperatureCherry shrimp 18–27°CKuhli loach 24–29°C
Both inside their range from 24–27°C — 60% of the narrower animal’s range.
A wide window. Both animals are inside their own range across most of it, and the tank can be run without either sitting at an edge.
- pHCherry shrimp 6.5–8Kuhli loach 5–7.5
Both inside their range from 6.5–7.5 — 67% of the narrower animal’s range.
A wide window. Both animals are inside their own range across most of it, and the tank can be run without either sitting at an edge.
- General hardnessCherry shrimp 6–15 dGHKuhli loach 1–10 dGH
Both inside their range from 6–10 dGH — 44% of the narrower animal’s range.
A real window, and a narrow one. The tank has to be held inside it, and there is little room for the drift that happens between water changes.
Computed from the ranges AquariumHQ publishes for each species, each of which records what it rests on — a source value, a habitat inference, a physiological requirement or a trade convention. Most are habitat inferences, and the species pages say which.