Quick answer
Shrimp often hide after moulting, but ongoing losses require a search for predators, filter intake access, escapes and unstable water.
What to check first
- Inspect at night
- Check filters and overflow boxes
- Review all tankmates
- Test GH, KH, ammonia, nitrite and temperature
Write down the test results, recent maintenance, new livestock, feeding changes and equipment faults. A short timeline prevents repeated guesses and makes patterns easier to see.
A practical action plan
- 1. Add intake guardsRecord what changes and retest before making another major adjustment.
- 2. Provide dense coverRecord what changes and retest before making another major adjustment.
- 3. Stabilise water changesRecord what changes and retest before making another major adjustment.
- 4. Remove predatorsRecord what changes and retest before making another major adjustment.
What to avoid
Do not dismantle the tank after one missing shrimp.
When it is urgent
Multiple bodies or sudden disappearance after maintenance suggests a serious water issue.
How to prevent it next time
Use stable routines: quarantine additions, test before and after major changes, maintain backup aeration, keep equipment accessible, and record enough detail to compare today with the aquarium’s normal baseline. Prevention is usually cheaper and safer than emergency correction.
Research and review
This is original AquaNexus writing prepared for practical aquarium use. The husbandry framework was checked against authoritative veterinary, safety, scientific or specialist references.
Test rather than guess and make changes at a pace the livestock can tolerate. This guide does not replace aquatic veterinary advice. Follow product labels and local electrical-safety requirements.