Tim,
The JBJ Pico that I have is glass, so I just use a standard mag float. I am thinking about cutting the floating piece off of it so that I can get closer between rocks. The upgrades that you'll want to do are the AC70 and new lighting. I can already tell the difference of having a mini fuge. Water quality is nothing to joke about in these little systems. I'm using distilled and salt from Aquarium Oddballs - period. 10% water changes every 3 days or so. This one is in my office - just make sure they don't turn the AC off on the weekend.
Now I just need to get some cheato - do LFS have it?
Hope to share some new pictures when I really get it off the ground - have had it up since March 1.
Joe Z