Some people silicone a glass divider into the tank to make half water and half land. I used eco earth in most of my tank and baking dishes for pools. Its a tad unorthodox, but my firebellies happen to love climbing and hopping around on dirt more than they like swimming. So they have three ficus trees, a pot turned on its side for a cave, and two-three baking dishes (sometimes I remove the third as its in a bad location for leaf droppings). My original set up involved a filter and sloping gravel, but mine were kinda "meh" about it. I have five in a 20 gallon long, but when I just had three they spent the first year of their life in a 10 gallon and were perfectly happy with the size - just in their case, not the set up. Some people say you can put up to five toads in a 10 gallon, but I personally would cap at 3.