Large Cholla Wood  Natural Aquarium Decor (4 Pieces, 5-6 Inches) Organic Untreated Driftwood PH Buffering Fish Cherry Shrimp Shelter Pleco Cichlid Catfish Chinchilla Hermit Crabs for Java Moss Marine Plant by Apollo Supply Natural Cholla Wood is a Perfect PH Buffering Ornament for All Aquarium Types 4 Pieces (5-6 Inches) that is a Great Anchor for Aquatic Plants and Moss You Will Receive 4 Unique Pieces That are Atleast 6 Inches in Length Attracts Lots of Shrimps and Grows a Very Good Amount of Bacteria and Microfauna Due to its Fibrous Nature. Also Used for Your Terrarium, Reptiles, Birds, Chinchillas, Parrots, Hermit Crabs, Rabbits, Hamsters to Chew On or Any Other Animals.