My LFS has a school of these that are about 4" long...rescued them from a banks display tank. He now has them in his display tank in the store. Tank is not even half full of water with lots of vegitation over the top half of the tank. He takes crickets and puts them in the branches over the tank....stand back and watch the show!. It is really impressive how far they can shoot water, and how precise they are with their aim. Cool fish..to really enjoy them you need a set up which shows off what they are named after!