Sorry, but everybody is right (yet again :P). My father in law did the exact same thing and they took over his tank. He is still to this day battling them (12 years later). I just started to add things to my tank after 3 months of starring at nothing. Trust me, its worth it in the end to nuke em. And after your cycle and you start adding things, you'll completely forget about those first couple weeks of bare rock!!