Observe the timing
Note when the water change ended and when the behavior began. A brief response to flow or movement is different from persistent distress.
Check whether the shrimp are upright, grazing, and moving through the tank. Avoid crowding the aquarium with repeated close inspections.
Review the replacement water
Confirm that the water was conditioned as required and that its temperature was reasonably close to the tank. Compare source-water readings when a large difference is possible.
Check test units and product directions instead of estimating chemistry by appearance. Clear water can still have a parameter problem.
Avoid stacking corrections
Do not repeat a large water change or add several buffers because shrimp moved after maintenance. Multiple changes can make the situation harder to diagnose.
If abnormal behavior continues, test relevant parameters and check filter operation. Record the change volume and preparation so future maintenance can be adjusted.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.