Just some play sand, they seem to love playing in the sand. What do you guys think of the scape? They are having fun going over and digging around the rocks and driftwood, should i leave the bottom more empty so they have more room to lay flat? It doesn't seem to bother them, but they do lay onto of all that stuff and idk if I should empty it more? Thanks for all the input I'm super excited! They are both all over the place this morning