The sharks won't kill each other, as they are just glorified minnows, at least I read on some site that that's what they are, not loaches, they are red-finned sharks not red tailed, not sure if that makes any difference. Everybody seems to think they will, but I really don't see it happening in front of my eyes, and I believe my own experience more than others. Like my gars breeding, heard it was impossible, but it has happened...
http://www.aquariacentral.com/forums/showthread.php?t=119122
Now to see if they live.
http://www.aquariacentral.com/forums/showthread.php?t=119122
Now to see if they live.