you could place a power head in the lower half of you tank on the same side as your return line.
i think the best you can do as far as livestock is the previously suggested cory cats. they're entertaining anyhow.
i've always wanted to try a freshwater clam in a sand tank to see if it stirs up the bottom or does anything of benifit. i kept an inch long clam in a small tank for about a year, and it spent all of its time burried verticaly in the gravel. i'd think it would stir the bottom of a sand tank for sure.
i think the best you can do as far as livestock is the previously suggested cory cats. they're entertaining anyhow.
i've always wanted to try a freshwater clam in a sand tank to see if it stirs up the bottom or does anything of benifit. i kept an inch long clam in a small tank for about a year, and it spent all of its time burried verticaly in the gravel. i'd think it would stir the bottom of a sand tank for sure.