Appropriate Size5.3*3.9*2.6 inch, Perfect for fishes in small and medium size tanks (5-50gallon) such as betta fish, molly fry, guppies, tetras, gouramis, ghost shrimp etc. Premium Resin MaterialThis Aquarium Decoration Driftwood Ornament is made of safe resin, natural and free of chemicals. It is safe for fishes, Shrimps, fish fry, betta, small fish. Before putting into the aquarium, please rinse with tap water first. No further maintenance needed. Perfect Fish HideoutsThere are 5 holes on this fish tank decoration log, they provide a way for fishes to swim and explore, to rest or hide, to reduce stress and avoid aggression. Your lovely pet betta or other smaller fish would be super happy to go in and out the trunk cave to sleep, rest, hide, play. Easy To Sink & StayThe aquarium betta log ornament has a flat base, and is completely hollow. Easy to sink and stay on the bottom of your fish tank. Instead of floating fish tank ornaments, it will not hurt fishes and break the well-designed underwater world. Catch Your Fish's EyesPretty up your fish tank and make your tank look a lot more fun and change it into a nature looking waterscape, pretty up your fish tank and make your tank look a lot more fun.