Made of ceramic material that can filter the water, natural color of the ceramic without paint. Create a natural and living environment for small shrimp and small shrimp love to go into this and hide or sleep. Provides shelter, hiding places, entertainment places for small shrimp. Offers the natural environment feeling and it is vivid and colorful to add lively life to your tank. Use the simple method of decorating and maintaining your aquarium, transform your aquarium into a beautiful landscape. Product description Sponge House can provide excellent shelter for small shrimp and Betta Fish, decorate your aquarium with minimal maintenance. It is safe for all terrariums, aquariums, freshwater, saltwater, does not harm fish and other aquatic animals. Usage: use cold water (ONLY) to clean it and do not need to be cleaned with a brush, and soak it for three hours, then leave it for a day before putting it in the tank. Attention: 1. Avoid high temperature; do not use hot water to clean it. 2. This is not natural color, it will fade a little. Item size (approx): 8 cm x 8.5 cm / 3.3 \"x 3.1 \" (L * H). Package Includes: 1 x Sponge House Aquarium Decoration