Abstract: A fish tank stand with two leg support structures, a top load bearing structure and a shelf that is assembled without any fasteners by engaging male/female locking mechanisms (e.g., peg/peg groove) integrally formed in the top load bearing structure with complementary locking structures integrally formed in the leg support structures and then engaging locking mechanisms integrally formed with the shelf with complementary locking mechanisms integrally formed with the two leg support structures. The stand is assembled by engaging pegs of the top structure in their peg grooves of the leg support structures and then inserting the pegs from the shelf into peg holders formed integrally with the lower legs to lock the stand in an assembled state. The top pegs are engaged with their grooves when the legs are perpendicular to the top structure, and then locked in place as the leg support structures move outwardly away from each relative to the top structure.