Why stone selection matters
Aquarium stones vary by source and composition; a product label and reliable seller details are more useful than appearance alone. In a shrimp-focused aquarium, the choice should also support steady routines, visible livestock, and access for basic care.
Before you act, check the material description and whether the seller notes water-chemistry effects. Compare the item with the rest of the setup and note any recent change that could affect what you are seeing.
A careful way to proceed
add one known piece at a time and keep a baseline reading for comparison. Make one adjustment at a time and watch how the aquarium responds during normal observation.
Avoid assuming every decorative stone behaves identically in water. Labels, products, and tank conditions differ, so use a reliable guide as context and record what you directly observe. If uncertainty remains, ask an experienced shrimp keeper before making a consequential change.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.