I would get 2 bamboo tunnels, it's better to have more, rather than not enough.
feed them a variety of foods. back when I was really new to the hobby, I just fed them 1 type of flakes. That really sucked for them (would you like to eat only plain pasta for your whole life? No, and it wouldn't be healthy.) I now feed all my fish a diet of 2 kinds of flakes, shrimp pellets, live food (usually blood worms), and veggies (cucumber, leattuce etc.) and sometimes something new. Oh, and they all have an unlimited supply of algae
good luck!