Yes and they get real nasty too. Arowana's are a territorial type of fish and once the Jardini takes over the Silver's territory it's game over for the silver. Anyways to the OP honestly I don't know where u did your research and homework on this combo but whoever approved it was some bad advice. Also u said your LFS said it was ok but of coz they are going to say it's ok because they want to sell the fish. IMO most if not all LFS's give bad advice...
