Awesome, thanks! I have a 90 gallon right now, so was thinking 2 or 3 tats to grow out before moving to say a 180-220 when they're large enough to warrant it. Not sure if payara do better in larger groups or not? I'd like to do whatever makes them less skittish/more outgoing, so if they do better in a group, I'll do 3 of just tats. If they don't care either way, I'll probably do 1-2 tats, and a falcatus (red tail barracuda) for now. I'm still reading through all these threads pulling as much info as I can, so I can make a better decision to begin with.
Now going to look up info on the chalceus, that thing looks really nice!