Hey, congratulations on your tank! I've had tetras before, but all of them seem aggressive with my other fish, so I don't have any anymore. I use to have one of the 'dyed' fish ( I didn't know it was painful for them!) she was purple and I named her Violet. She was really mean to my little guppy named' Skipper' so I had to separate them. I thought alomost all tetras were aggressive, cause I've had lots of kinds and they weren't ever too good with my other fish!