Rinse thoroughly with clean water and remove loose material. Natural items may be soaked and checked more closely; never use soap or cleaning agents.

Position it securely and check sharp edges, tight openings and loose parts. Animals should be able to use hides without becoming trapped.

Natural materials may release tannins or minerals, with effects varying by product. Follow the description and test the water when keeping sensitive species.

Brush or gently rinse in removed aquarium water when needed. Some biofilm is natural and often provides food for shrimp and snails.