I currently have a 75 gal barebottom aquarium besides some rock and driftwood structures for hiding,its a temporary set up until I move and get my bigger tanks set up.and I have a 10in ornate bichir,12in black Wyckii and a 6in platinum Koi and they've all been co-existing very well together believe it or not.i will be posting some pics a lil later today.