... I think he was just joking.
Seriously though, you should talk to someone who would know more about it -- if you got it at a pet store, somebody who works there might be able to help you, even if only by telling you you should've put them in separate tanks.
Seriously though, you should talk to someone who would know more about it -- if you got it at a pet store, somebody who works there might be able to help you, even if only by telling you you should've put them in separate tanks.