Probably not. If they are comfortable living in a 29, they're probably not big enough to be sexually mature.
And they just won't spawn unless they have lots of room to chase each other.
Sorry about the bad news :(
The only person I ever knew who spawned them without a pond had 4 stock tanks in his basement and 2 in his yard, he bred show quality Orandas. Breeding size ones are BIG. About 5-6 inches from the back of the gills to the base of the tail.
A stock tank is this; http://www.lowes.com/pd_225317-60456...r|1&facetInfo=