Here are some big personality fish appropriate for your tank: flame or longnose hawk, starry or orange spot blenny, or tiger or pearly jawfish.Thanks for the reply. I was thinking I could keep up with feeding pods but it sounds like it would be difficult. Was thinking of adding fire fish but really I just want one more active fish in the tank that will be fun to watch. I built this tank for my daughter and she has taken a huge interest in the tank and helping me to the best of her ability (she's 5) take care of it. So the more personality the better for this last fish.