I bought this for a hermit crab substrate after having bad results with clumping sand. This one package made enough substrate to fill a 5 gallon bucket when damp. It holds moisture very well and doesn't feel muddy. I mixed it with plain white sand to make a substrate for my hermit crabs, and immediately 2 of them dug in. One stays in it all the time except when he's eating, and the other 2 are much more active since I've replaced the substrate with the coconut fiber-sand combo. It also keeps the humidity up, which is really important for crabs. I'm going to keep using this for sure. The only complaint I have is that it's very challenging to break apart when it's compressed. I stabbed it with scissors for a while then gave up and just expanded it all at once, so now I have a bucket of damp dirt that I hope doesn't mold or anything before I need to add more substrate. It's also in my goldfish tank cleaning bucket, so I'm not sure what to do... But other than that, it's ideal.
Rating: [4 of 5 Stars!]