i have recently taken my convict out of my tank and put into another one because of his aggressive behaviour, i had him in with the lombarda which i recently flushed down the toilet for attacking the convict and basically eating his fins and such, now my jack dempsey has killed my baby oscar (one of my favourites), so i have put the jack dempsey in with the convict....will they just kill each other ? or should i just get rid of the both of them seeing as neither of them can be with the other fish?????