I dont think I was all that harsh. Aquarium salt will not replicate a brackish environment. (thats been well established) The other fish in the tank are NOT brackish fish, so advocating making the tank brackish is very poor advice. Perhaps it will do "fine" in freshwater, evrything i have seen is to the contrary however. "fine" refers to long term health, not a day to day observation of the fish. Mabey pacu will provide some information that contridicts anything I have read about these cute lil buggars.