We are talking about a 10 gallon aquarium so that is what I am referring to...They are far too large for a 10 gallon is what I am saying...you have to consider their territory and give the females a chance to get a break from the males...
As for aggression..yes they can get pretty aggressive it is something people should be aware of...it is like with Betta's some are more aggressive than others so again a larger tank is needed for the other fish to be able to stay out of their territory. They are also not an option for peeps who don't like some of their fish to be chased away a lot and nipped at a little...
I have lost corydoras, Neon's, Red Nosed Rummy's and Platy's to both Rams and Cacatouides and that was in 35 Gallons
So yes in my opinion Apisto's are among the more agressive fish in a community tank
Sheesh try and give a explanatory answer and I get laughed at....