I would avoid Goldfish as if the piranhas were to eat em, they are full of fat and bad for there health in general. My recommendation is Exodons or Silver Dollars or even Columbia’s tetras or diamond tetra. A perfect example would be the Disk Tetra (Brachychalcinus Orbicularis) but they can be hard to find, I know someone who sells them for $5 Canadian each. The problem with tiger barns is well... why not a fish from the same or close by location as your piranhas as like it could induce more natural behaviour... just a theory eh.Hey Thx for putting out the info. My Caribes seem to be getting pretty lazy. The only other fish in the tank are 2 large plecos. Maybe I should add some active fish. The piranhas won’t mess with the Tiger Barbs?
I do have 2 large Goldfish that I add in every once in awhile to control a snail infestation. Piranhas seem more active during that timeBut I take em out after a week or so because snails are eaten up and goldfish have received a thorough fin trimming lol! Maybe I’ll try Tiger Barbs. Thx