Hmmm. Tab, I just read your comment about ottos dying off with any ammonia/nitrites. Interesting.
I never "cycled" my tank so to speak, had a piece of driftwood from an established tank at lfs, treated all water with prime and followed the directions on a bottle of stability. Never had nitrites and ammonia never went over .50 ppm. I've had an otto since the beginning with no issues. But I did lose some pygmy corys, whether from a bad batch from lfs, or low levels of ammonia. Never had any issues with algae either. Perhaps I've been lucky... =)
sdave, I love the tank! I'd love to have a fish tank in a wall! A really big fish tank!