Decoration usable in fresh water and sea water, does not deteriorate. Has no influence on the biological balance of the aquarium. Rinse with clean water before use. Carefully remove the decor from its packaging and rinse it with lukewarm water. never use soap, detergents or toxic substances (such as hydrogen peroxide or derivative products). Please be careful when using products containing formaldehyde. The color of the decorations can fade and the water becomes opaque. Even if it is impossible that the fish are affected, we recommend removing the decorations from the aquariums for the duration of the use of these substances, i.e. to put the decorations back in your tank only at the end treatment.