My 4 year old silver has been very calm since he was a baby. I recently got rid of everything in the tank except for my 10" widebar. I put 2 large oscars in the other day and they just fought. I took out the oscars because the Aro has now been jumping hitting the tops. Not just jumping randomly, but scouting out then hitting more than 5 times in one spot. Almost like he is looking for a weak spot to get out. Anyone with any thoughts on this please chime in.