How long do I cycle a 29 gallon fish tank? And what kind of fish go well together in one?

running an empty tank does not cycle it. You have to put something in there for the benificial bacteria to eat before it can begin to grow. You can use several different things to "feed" it. You can put an uncooked shrimp in and let it decompose or you can feed it fish food every day or you can use a few drops of amonia. Do a google search for "fishless aquarium cycling" and you will find a ton of information on the subject.