No, it is in the setting up of a new tank as well, TLH. I was wondering the same thing, Orion. I then started thinking that since we hadn't started adding ferts yet that per haps is was just to help out with cleaning the water and stuff since everything at this point was new. Essentially just like setting up a nonplanted tank because we aren't adding anyhting and we don't want an accumilation of anything yet. IS that right, Avalon? I am really trying to get this stuff down. I want to use this method with my 29. IT is by far the easiest I have come by. I was wondering though, would my tank still be ok to do this way because essentially it is new to plants but has been set up without plants going on 4 months.