I might get a veiltale in a tank that's at least 30 gallons (I don't know the size but I know it will be 30 gallons+) and I want to know some good tank mates.
nothing. one fancy goldfish is just enough for a 30g. if you had something like a 55, you could have two of them. possibly you could have some large apple or mystery snails, but goldfish will eat small ones.