The Anatomy of a Great fake jellyfish aquarium
https://codytaox216.kinja.com/20-up-and-comers-to-watch-in-the-corations-plastic-jell-1836268965
I have 2 of these in my 20 gallon and me and my fishies love these. They move like real jellyfish and add a different touch. Very neat, wish I had room for more.