May 10, 2012 - I have a 29 gal aquarium and im thinking about changing some fishes out with new ones. So far I have 4 glo fish, 4 zebra danios, 1 male betta, and 2 panda corys, and a gold mystery snail. i plan to change out some new fishes with the zebra danios. Do anybody know any pretty freshwater aquarium fishes that are not aggresive and dont fin nip? My betta does pretty good in the aquarium and he doesnt mess with anybody and they dont mess with...