I've got an 8-9" oscar in an 80 gallon tank. At the LFS a few days ago I saw the biggest bristlenose I had ever seen... it was probably around 8" long and at least 2" wide across the head, with a crazy set of face bristles. I was thinking it might be able to join my oscar... Is this a dangerous bet? Would several pleco-size tubes and caves help? Also, the tank will be getting an upgrade to a 180 in February- I have a savings account for it and a specific upgrade plan.