· Made of ceramic material, it has filtering function, tasteless and environmentally friendly. It is safe for aquatic pets and good for water quality.· Provides spawning, breeding, hiding, playing and resting spot for small bream, shrimp, fishes and other aquatic pets.· Aquarium ceramic decorate is smooth and without any sharp edges, won't scratch your fishes.· Hollow out house design, you can clearly see very movement of your little fish or shrimp inside the cave, there are many holes on the surface.· Offer the natural environment feeling and it is vividly and color detailed to add lively life to your tank.