I like to give Zoomed a 5 star rate with this product!!! the Crabs were all over it in less then a half hour of puting it in the tank!!!!! it's all Natual Cork bark thet comes in a sheet it looks as if it was just pulled right off the tree!!! you can even cut it with a Sharp knife and make shapes PetCo Sells this stuff for $11.85 for a medium sheet ( thats about 12x10inches) You can even put it in the water, and it act like a raft for your crab!!!! and on the label it says you can attach live plants to it for a even more natual look!!(Don't know how you would attach it) Any way just though i'd let every one know this is a good product!