That's alright. If it helps I did a bit more asking around with other people I know who own fish like this (it helps when you work at the LFS ). The Discus purists got rather touchy and the normal reply was "Why?!". But everyone else didn't see a problem, I even managed to catch up with the guy I know who's got Polys and Discus together and the tank is still doing fine.
408smokin;3722627; said:
I would go with the silver aro.. Discuss will not be a good way to go, plus discuss need to have lower PH level then bichir.
I haven't kept aros personally but have kept saratoga (aussie aros) and have found its been the case of who owns the place first. I had to move my polys into my toga tank for strategic purposes and found him nippy towards them so removed him straight away. If it's not a big loss go for it. But for what polys are worth over here there is no worth in taking chances.