Now, keep in mind this tank is only a temporary (6 months or so) home for the Bleeding Heart Tetra and 5-7 cory cats. I eventually want to have either some banjo cats, a clown pleco, or some loaches, all of which are burrowing animals. I have sand in it now, but I think I may have gone a little over board. Any input is appreciated, since it'll be much easier to change BEFORE I have livestock in it. The tank is a standard 29.