Compatibility is highly debatable. In a big enough tank yes they are compatable. In a small tank, no. Their is no fixed answer it is all trial and error.
Vebas had a festae and a few dovii last time i was in.
yer i know, dovii are my favourite species. I had a 14" one in a 6 x 18 x 14.....he could only just turn aroudn so i had to sell him. Then i got the 5 x 2 x 2 a few months later and sorta always wanted him back.