gobies in a 33?

[Tanman]

hi there i was just wondering if there is any species of gobies or bottom dwellers that i can put in my 33g tank, with my sump its about a 55. but the surface area is only 33. i have some brown algae on top of my sand and i need something to flip the sand for me. i know most will die in my tank because they'll eat all the microcrustaceans and then eventually starve to death and thats the last thing i want to do! thanks in advance.