You'll be fine. Ribbons are not pushy like snowflakes. If anything, I'd add some weighted plates on the corners at max. I am assuming you run a waterline 2" below the eurobrace, another deterrent.Yes. The entire tank is euro braced top and bottom.
However, if they are restless and can't find a cozy camp. I would opt in for pvc tunnel. That's my biggest concern with ribbons. Just making sure they are cozy.
You probably saw the ribbon eel on a thread where one of the guys ribbons got chopped up. That's an extreme case where that one eel was not comfortable at all.
Edit: he was also being munched on by an aggressive trigger.
