Easy to Clean: Smooth surfaces requires minimal maintenance—just rinse with warm water to keep the aquarium clean and hygienic Breathable Design: Multiple holes enhances water flows and oxygen circulations, maintaining a water environment for all tanks inhabitant Safe Hideouts: Unique tunnel design provides an ideal shelter for fish to hide from predators or rest when stressed, creating a secure and comfortable environment Consist of Polylactic Acid, ensuring without harm to water and keeping fish and shrimp in freshwater or saltwater tanks Floating Feature: Light weight Polylactic Acid construction allows it to float on water surfaces without sinking, offering fish play spaces at any depth in the aquarium