Slate is a good idea and looks pretty easy to put together.. I just don't prefer it, because it's so flat and I also like to rearrange my caves... all the time..
A method I like is to use a long chunk of slate, and set one end on driftwood in the tank, and let the other just sit on your substrate. If fish need it bigger, they will dig it out.
A method I like is to use a long chunk of slate, and set one end on driftwood in the tank, and let the other just sit on your substrate. If fish need it bigger, they will dig it out.