Oh, thanks for sending that, do you know if eco earth fiber substrate is safe if I can't get any moss for some reason? If its not safe, I just wondered why? Thanks I forgot to mention if eco earth is not safe, would this be from size and shape of substrate if frogs eat it by accident? That's all my store had, I'll have to use it till I get moss. I'd use sand but that makes tank really hard to clean and rinse.