Re: Best frogs for groups?
Years ago I grew up a couple of groups of tincs together -- a group of 4 and another of 3. They did okay in 90 gallon vivs with plenty of broken sight-lines, hides and levels, but I think I got lucky.
I did see some aggression from time to time but it was sporadic, and they weren't all in there together longer than a couple of years or so -- who knows what it would have been like long-term.
I have a feeling the lowest animal in the hierarchy would have suffered eventually.