Really small tanks are actually hard to cycle! Just keep up on WC's to keep ammonia and nitrites down to .25ppm or lower. That's all you can do in a fish in cycle. Your 10g sounds like it's getting close to the end of cycling.
Now when you set up the 29g if you plant the tank heavily, I mean at least 80% of the substrate planted with some plants like Water sprite, Wisteria, Ambulia, any of the Hygrophila's, and some moss on DW your tank will actually cycle much faster. So I would plant right away, put a little bit of the floss media from one of the other tanks to jump start the cycle and between that and the plants your cycle could run though very fast. I had 14 angelfish in my 220 at 14 days as the tank was cycled because I planted about 85-90% of the substrate with fast growing plants.