Just keep in mind that when the cycle is complete it just means you have the right kind of bacteria to handle the process. But what everyone misses is that your numbers may be zero so it can handle whatever you were using to generate the cycle but it is not established enough to handle a new load of ammonia produced by the new fish you add. It takes time for the bacteria colony to get big enough to handle whatever you want to rhow in.That is why it is a good idea to let the tank run a while longer and why you should only add one new ammonia producer at a time. Once it is well established, over a year, you can add a few fish at a time and it can handle it.