What we know, topic by topic

Use this map to find the practical guide, inspect the evidence behind it and see the important questions that remain open. It covers every topic in the current evidence registry.

Counts are an inventory, not a confidence score. One well-designed study can be more useful than many narrow records. A direct study is still limited by its animals, water, duration and endpoint. Zero named gaps means no gap is currently tracked for that topic, not that the topic is settled.

Start with the guide for a bounded keeper decision.
Open the topic records when the study conditions matter.
Read the named gaps before repeating a confident rule to someone else.

Topics mapped: 21
Named open questions: 16
Registry reviewed: 2026-08-12

Topic and practical guides	Reviewed records	Open questions and search trail
Anatomy Name visible shrimp anatomy (evidence dossier); Sex shrimp with stated confidence (evidence dossier)	58 total method-reviewed records 49 direct Neocaridina records 20 direct controlled experiments Inspect every anatomy record	No named gap currently mapped. Show us a consequential missing question.
Behaviour Describe movement and behaviour without diagnosis (evidence dossier); Evaluate tankmates by the colony outcome (evidence dossier)	15 total method-reviewed records 13 direct Neocaridina records 12 direct controlled experiments Inspect every behaviour record	3 named open questions What dissolved-oxygen histories change survival, behaviour, growth or reproduction? What photoperiod, intensity and spectrum support Neocaridina welfare and colony outcomes? How do named fish species affect adult retention and juvenile recruitment? 3 reproducible search reviews: 2026-08-12, 2026-08-12, 2026-08-12
Breeding Record breeding without a guaranteed calendar (evidence dossier); Sex shrimp with stated confidence (evidence dossier)	48 total method-reviewed records 41 direct Neocaridina records 25 direct controlled experiments Inspect every breeding record	9 named open questions What chronic nitrate-only exposures affect Neocaridina across life stages? What dissolved-oxygen histories change survival, behaviour, growth or reproduction? What GH, KH, pH and conductivity combinations are true biological optima? What photoperiod, intensity and spectrum support Neocaridina welfare and colony outcomes? Which complete diet and ration combinations support Neocaridina across the full colony life cycle? How do named aquarium colour lines segregate in F1, F2 and backcross generations? How do named fish species affect adult retention and juvenile recruitment? What determines a stable operating capacity in a multigeneration home aquarium? Which microplastic histories affect individual growth, reproduction and survival in home-like systems? 9 reproducible search reviews: 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12
Chemical exposure Respond to possible chemical exposure (evidence dossier); Triage abnormal observations and mortality (evidence dossier)	25 total method-reviewed records 23 direct Neocaridina records 23 direct controlled experiments Inspect every chemical exposure record	2 named open questions Which treatment doses are effective and safe for confirmed Neocaridina health agents? Which microplastic histories affect individual growth, reproduction and survival in home-like systems? 2 reproducible search reviews: 2026-08-12, 2026-08-12
Colour Record mixed-colour crosses across generations (evidence dossier); Use selective-breeding and genetics claims carefully (evidence dossier)	21 total method-reviewed records 14 direct Neocaridina records 12 direct controlled experiments Inspect every colour record	2 named open questions Which complete diet and ration combinations support Neocaridina across the full colony life cycle? How do named aquarium colour lines segregate in F1, F2 and backcross generations? 2 reproducible search reviews: 2026-08-12, 2026-08-12
Feeding Feed without a universal schedule (evidence dossier); Separate grazing from cleanup claims (evidence dossier)	34 total method-reviewed records 33 direct Neocaridina records 28 direct controlled experiments Inspect every feeding record	2 named open questions Which identified and conditioned leaf litters improve Neocaridina outcomes in home-like systems? Which complete diet and ration combinations support Neocaridina across the full colony life cycle? 2 reproducible search reviews: 2026-08-12, 2026-08-12
Filtration Run filtration, oxygen and flow (evidence dossier); Cycle and commission a shrimp tank (evidence dossier)	12 total method-reviewed records 5 direct Neocaridina records 4 direct controlled experiments Inspect every filtration record	2 named open questions What dissolved-oxygen histories change survival, behaviour, growth or reproduction? Does a particular filter type or turnover rate improve Neocaridina outcomes? 2 reproducible search reviews: 2026-08-12, 2026-08-12
Genetics Use selective-breeding and genetics claims carefully (evidence dossier); Record mixed-colour crosses across generations (evidence dossier)	31 total method-reviewed records 18 direct Neocaridina records 11 direct controlled experiments Inspect every genetics record	1 named open question How do named aquarium colour lines segregate in F1, F2 and backcross generations? 1 reproducible search review: 2026-08-12
Growth and lifespan Record growth, maturity and lifespan (evidence dossier); Record breeding without a guaranteed calendar (evidence dossier)	41 total method-reviewed records 39 direct Neocaridina records 26 direct controlled experiments Inspect every growth and lifespan record	7 named open questions What chronic nitrate-only exposures affect Neocaridina across life stages? Does a particular filter type or turnover rate improve Neocaridina outcomes? What GH, KH, pH and conductivity combinations are true biological optima? Which complete diet and ration combinations support Neocaridina across the full colony life cycle? What is the individual hatch-to-death lifespan distribution in home-like aquaria? What determines a stable operating capacity in a multigeneration home aquarium? Which microplastic histories affect individual growth, reproduction and survival in home-like systems? 7 reproducible search reviews: 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12
Habitat Build habitat and conditioned surfaces (evidence dossier)	15 total method-reviewed records 15 direct Neocaridina records 12 direct controlled experiments Inspect every habitat record	3 named open questions What photoperiod, intensity and spectrum support Neocaridina welfare and colony outcomes? Which identified and conditioned leaf litters improve Neocaridina outcomes in home-like systems? How do named fish species affect adult retention and juvenile recruitment? 3 reproducible search reviews: 2026-08-12, 2026-08-12, 2026-08-12
Health Triage abnormal observations and mortality (evidence dossier); Quarantine by source and contact network (evidence dossier)	61 total method-reviewed records 51 direct Neocaridina records 37 direct controlled experiments Inspect every health record	10 named open questions What chronic nitrate-only exposures affect Neocaridina across life stages? What are chronic ammonia and nitrite no-effect ranges for Neocaridina? What dissolved-oxygen histories change survival, behaviour, growth or reproduction? Which identified and conditioned leaf litters improve Neocaridina outcomes in home-like systems? Which complete diet and ration combinations support Neocaridina across the full colony life cycle? Does drip rate or transfer duration change post-arrival outcomes? Which package combinations protect Neocaridina during real transport? What is the individual hatch-to-death lifespan distribution in home-like aquaria? Which treatment doses are effective and safe for confirmed Neocaridina health agents? Which microplastic histories affect individual growth, reproduction and survival in home-like systems? 8 reproducible search reviews: 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12
Molting Investigate molting and exuviae (evidence dossier)	12 total method-reviewed records 10 direct Neocaridina records 5 direct controlled experiments Inspect every molting record	1 named open question What photoperiod, intensity and spectrum support Neocaridina welfare and colony outcomes? 1 reproducible search review: 2026-08-12
Nitrogen waste Read ammonia, nitrite and nitrate correctly (evidence dossier); Cycle and commission a shrimp tank (evidence dossier)	15 total method-reviewed records 6 direct Neocaridina records 5 direct controlled experiments Inspect every nitrogen waste record	7 named open questions What chronic nitrate-only exposures affect Neocaridina across life stages? What are chronic ammonia and nitrite no-effect ranges for Neocaridina? Does a particular filter type or turnover rate improve Neocaridina outcomes? What GH, KH, pH and conductivity combinations are true biological optima? Does drip rate or transfer duration change post-arrival outcomes? Which package combinations protect Neocaridina during real transport? What determines a stable operating capacity in a multigeneration home aquarium? 5 reproducible search reviews: 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12, 2026-08-12
Stocking and density Choose a starter group and measure capacity (evidence dossier); Handle surplus shrimp responsibly (evidence dossier)	3 total method-reviewed records 3 direct Neocaridina records 2 direct controlled experiments Inspect every stocking and density record	1 named open question What determines a stable operating capacity in a multigeneration home aquarium? 1 reproducible search review: 2026-08-12
Tankmates Evaluate tankmates by the colony outcome (evidence dossier)	3 total method-reviewed records 1 direct Neocaridina records 1 direct controlled experiments Inspect every tankmates record	No named gap currently mapped. Show us a consequential missing question.
Species and taxonomy Separate species, trade line and provenance (evidence dossier)	30 total method-reviewed records 15 direct Neocaridina records 0 direct controlled experiments Inspect every species and taxonomy record	No named gap currently mapped. Show us a consequential missing question.
Temperature Separate temperature effects and house choices (evidence dossier)	11 total method-reviewed records 9 direct Neocaridina records 5 direct controlled experiments Inspect every temperature record	1 named open question Which package combinations protect Neocaridina during real transport? 1 reproducible search review: 2026-08-12
Transport and acclimation Receive and transfer shipped shrimp (evidence dossier); Quarantine by source and contact network (evidence dossier)	3 total method-reviewed records 2 direct Neocaridina records 2 direct controlled experiments Inspect every transport and acclimation record	2 named open questions Does drip rate or transfer duration change post-arrival outcomes? Which package combinations protect Neocaridina during real transport? 1 reproducible search review: 2026-08-12
Water parameters Interpret GH, KH, TDS, pH and conductivity (evidence dossier); Plan water changes and top-offs (evidence dossier)	15 total method-reviewed records 11 direct Neocaridina records 5 direct controlled experiments Inspect every water parameters record	1 named open question Which identified and conditioned leaf litters improve Neocaridina outcomes in home-like systems? 1 reproducible search review: 2026-08-12
Water testing Improve measurement quality (evidence dossier)	1 total method-reviewed records 0 direct Neocaridina records 0 direct controlled experiments Inspect every water testing record	No named gap currently mapped. Show us a consequential missing question.
Wild populations Separate species, trade line and provenance (evidence dossier); Handle surplus shrimp responsibly (evidence dossier)	25 total method-reviewed records 17 direct Neocaridina records 0 direct controlled experiments Inspect every wild populations record	No named gap currently mapped. Show us a consequential missing question.

What this map does not claim

More records do not automatically mean stronger, more consistent or more useful evidence.
A controlled experiment does not automatically reproduce a home aquarium or establish an optimum.
A named gap is a defined unanswered question, not proof that no useful action is possible.
This map measures the current registry. It does not claim that every relevant publication has been found.

Open the complete research map, read the editorial method, or ask a keeper question the library does not yet answer.