Match the conditions
Observe at a similar time, light level, and distance from the aquarium. Shrimp may hide when the room changes suddenly.
Keep the normal feeding routine in mind; a group near food may not represent the rest of the day.
Keep the check brief
Look for filter flow, upright movement, grazing, and any obvious problem. Avoid tapping glass or moving plants to increase visibility.
The purpose is to notice changes, not to force all shrimp into view.
Record exceptions
Note maintenance, new products, or unusual behavior that differs from the baseline. Add water readings when you test.
A repeated trend deserves more attention than one quiet observation. Use the record to decide what to inspect next.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.