I have a group of these guys growing out in a 100 gallon tank. Right now they are pretty small and because of the tank size they seem a bit skiddish. Can someone suggest a nice tank mate that isn't overly aggressive to add? Right now I have them in fresh water and will be slowly adding salt over a period of time to reach the proper salt content. I am feeding them mostly spirulina and veggie pellets so any feeding, tankmate etc... ideas are welcome, thanks. Also I really like these fish, they seem like they will be very mellow so no aggressive tankmate ideas.