Jim, I was wondering what kind of jellyfish you plan on adding to the aquarium. I saw some in a tank at Sea World one time, and I just wanted to stand there for the longest time and watch them. They truly are poetry in motion, and I think it would be a nice addition to the tank. The link below tells about what all is required to keep jellyfish. Not something I would want to try myself thats for sure
The second link has some facts about the jellyfish.
www.aquarium-design.com/jellyfish.html
www.aqua.org/animals/species/jellies.html
Thanks,
Grape