jawbrodt wrote:
Those are cool. As you already know, you aren't supposed to put two in the same tank, or they will fight. So, I bet you can guess what is coming next.....Yes, me and a friend just had to find out how viscious(?) they really were. We bought 2 and put them in the same bowl, and they just chased each other around, nipping at each other's tail. Not very exciting, but, we just had to find out for ourselves.

yeah, two males + same tank = bad news.
in fact, I don't know pet stores have them next to each other in clear containers without some kind of opaque separators between them. I don't know about you but I wouldn't want to be pissed off all the time until someone came along to buy me.
I even did the pinch of kosher salt in the tank. Don't know why they tell you to do that. It might be a water softener or something.