The jellyfish who burnt his tentacles off is doing very good. He grew one very long tentacle back already. Its abnormally long, which probably has something to do with cell trauma from the injury. The rest of his arms are growing back, just slower.
I also noticed that growing the brine shrimp in the tank adds the bonus of clean tank walls. these little shrimps are always scrubbing at the walls, plus they are much less polluting to the tank than frozen food is.
I have to say Im very happy with the current situation.