ive got a pair of convicts in with 3 parrot fish and 3 clown loaches in a 4ft tank they have 120 plus fry best parents ive ever seen they control 3/4 tank even though there less then half the size of parrots .
I encourage you to repost in the New World Cichlids but I was advised there that the severum and angels are fine together and that is what I have now though my Sev is only and inch. I don't know enough about the acara to say more about that.