1. Natural Elements: It includes wooden barrels, logs, tree debris, and hide-out buckets, introducing natural elements to create a primitive ecological underwater environment. 2. Provide Shelter: These items can serve as hiding places for fish, meeting their habitual needs and increasing the fun and sense of security in the fish tank. 3. Resin Material: Made of resin, it is sturdy, resistant to water and corrosion, and has no adverse effects on the water quality, allowing for long-term use.