First I created a false bottom using hydro balls and slate rock. I then used gravel to seal any cracks so the frogs cant sneak through. Keep in mind all the hydroballs and slate rock must be washed before you put them in your tank as they are covered in dust and minerals which will cause hard water. I then pulled out some live moss from my back yard. This moss had to be washed very well as it pulled up dirt with it, which we don't need in our water. the