Originally Posted by Rivercats
Sounds like he's got a "this tank is mine syndrome". It's unusual for a single ram to claim an entire tank but you can try treating him like an angelfish doing this. Remove him from the tank, rearrange, then add him back. This often, but not always, tricks the fish into thinking it's in a new tank where it has no territory which often stops the aggression.
I was worried you were going to say that. I was just to the point of being happy with 2/3 of my scape too
Oh well I guess now is as good a time as any to add the driftwood that I've been soaking.