"A failed molt means the shrimp needs more calcium"
Use the complete answer. A verdict without its boundary and next action can become another myth.
What is supported
mineral availability and water chemistry matter to exoskeleton biology.
What is not established
one incomplete molt identifies a calcium deficiency, proves low GH caused it or validates adding a mineral product.
What to do next
distinguish the animal from an exuvia, measure immediate water hazards and preserve the event history. Use the molting guide.
Exact evidence trace
This is the selected claim-level trace, not every source used by the broader guide. Roles describe how each record is used here; they are not quality grades.
Evidence records
- interpretive context Molecular cloning and functional analysis of two calcium-associated cuticular protein genes in Neocaridina denticulata sinensis: Calcium-associated cuticular proteins are involved in exoskeleton biology under the studied molecular methods.
- interpretive context Calcium balance and moulting in the Crustacea: Crustacean calcium balance is biologically relevant but does not diagnose one aquarium molt event.
- limitation context Effects of the juvenile hormone analogue insecticides fenoxycarb and methoprene on Neocaridina davidi: Molt-related outcomes can occur in a chemical-exposure context, preventing a one-cause calcium inference.
Supporting authorities
- Hardness of Water: Defines hardness while explicitly refusing a molt diagnosis or species optimum.
Named open questions
- What GH, KH, pH and conductivity combinations are true biological optima? Field occurrences and study culture water describe places or reproducible conditions, not species-wide GH, KH, pH or conductivity optima.
Inspect the broader guide evidence dossier for all records, authorities, gaps, searches and changes connected to the practical guide.
Share the complete answer
Open the plain-text answer or open the original teaching card.
The detailed guide owns the evidence and limitations. Challenge this claim with a stable source if an important boundary is missing or stale.