Surface and shelter
Shrimp can pick across rock and wood where fine growth collects. Crevices also provide spaces to hide after molting.
A newly added object may be biologically bare at first, so do not expect it to immediately function like mature hardscape.
Check source and material
Use items sold or documented for aquarium use and inspect for paints, coatings, oils, or unknown residues. Natural origin alone does not prove safety.
Some materials may affect water chemistry. Test and research the specific material rather than relying on a generic name.
Clean and arrange thoughtfully
Rinse objects with clean water and avoid household cleaners. Stabilize heavy pieces so they cannot fall or crush animals.
Leave access for maintenance and filter flow. A good hardscape supports the tank without making it impossible to inspect.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.