ok got home from school today feed my fish put 5 new rummys into my 25 my mom brough them while i was at school only to find 1 dead cory in my 10 when i found him they was blood on his side deep red quite a bit and it looked like one of his eyes was missing also he had a stump of a tail i also remember someone eles with a dead cory and that one had no tail i pretty sure that something killed it so what eles could it be apart from the other cory? i dont think anything eles in there is cablebe of killing it and will the other be ok on its own i dont want to put another in only to find it dead thanks for help.