How old are they....? -.- If they are young, like me, then, chances are that they are not allowed to do fishless cycling using ammonia and that such.... I told my Mom that when I get a 30-gallon (hopefully) that I wanted to do a fishless cycle and she went on here and read all about it and when she was finished her only reply to me about it was, "NO."
I have a little 8-year-old sister who is a bit too friendly with my tanks and my fish stuff, and an 11-year-old sister who doesn't like it and in a fit of rage (because she's, like, the meanest and moodiest in the *HOUSE*) might accidentally destroy something, fishless cycling is *NOT* the way to go as I don't want either of them poisoned or even killed by ammonia, and I would prefer not to have an ammonia burn or, even worse, a *HOLE* in the floor due to ammonia, thank you very much. -.-;