Actually, more recent evidence is that nitrosomas and nitribacter aren't that important in FW aquaria. Nitrospira seem more implicated... can't find the links right now to several scientific papers discussing that, but perhaps someone will post them.
I believe they were written by Dr. Tim Hovanec before he went to work for Marineland. I had a major computer problem a month or two ago and lost many of my bookmarks, so if someone has the link to them, I'd appreciate seeing them. It would save me a search...
I am still fishless in my 29g, its been 2 weeks now. My question is on the salt. I bought some from my lfs, how much goes in the 29g? And do I put in it now or wait till I stock? Also, since the 2.5g's are almost completly cycled should I put any in them? Almost there....... WOO HOO