no my sand bed would not be deep enough, but why couldn't i keep a clown and a dogface in a 55gal for awhile while their still small, i do realize that i'll need a bigger tank but not for awhile yet, right?
My clown trigger never bothered my sand sifting star, the star would be in plain view during the day some times and was never bothered. But i could see him one day turning and taking a bite possibly.