Right, you didn't say that but that helps!
Your call then, some people say cycling with fish is cruel others swear by it, all down to personal choice at the end of the day.
Im guessing that as the other tank is quite small as well you won't be able to pinch some media from the cycled tanks filter as there wont be much of it? That would help speed up the process and cut down the amount of time the danios will be living in unsuitable water