I threw in a dubia but it hid. I also have her some fruit flies.

Communal tanks always run the risk of someone getting ate.
Now if you had a sac and didn't have to buy them all, I think it wouldn't hurt as bad if one was lunch. I would love to try it out one day.
Almost have it run itself. Have clean up crews working, plants growing. If I get to breed my OBTs I might just have to try it out.