well, all i know or heard about jelly keeping (From when i wanted to keep some) is the tank needs to be cylindrical so the jellies don't get trapped in the corners of a tank, plus their needs to be enough water movement to help keep them suspended in the tank?
Another thing to consider is food source? since i think they eat zooplankton? which i don't think you can just go out and buy?
Another thing to consider is food source? since i think they eat zooplankton? which i don't think you can just go out and buy?