Although I've had a scary thought come to mind. I'm wondering if the jellyfish that died was of the opposite sex needed for jellyfish reproduction. I really hope not, but its very possible.
On another note I should be getting some jellyfish polyps from jellyfish art within a month. so I can just start my own culture instead of relying on my jellies. I'm gonna build a new polyp/ephyra tank because Im not happy with the one I have now. I'm thinking I will take two large Tupperware storage bins and use them as aquariums. They are plastic which makes drilling much easier. The design is pretty simple. One container sits on the other. The top will be the ephyra and grow out space. The bottom will be split in half. One side will be the main polyp colony. the other will be filtration. A mesh screen in the center of the container will do the job. Water will exit the top container through one side, which will be screened off. Water will come back through a spray bar.