Thanks, I have one young JAG I think female with convict (one male and two female) and sajica (one male and three female) and three ancistus in a 250 litres (I don´t know - 55 gall?) tank, JAG may be 7 month old. And my friends says, that it is impossible, that managuensis female kill ancistrus , when she be older. But in our country JAG isn´t usual fish, I know only one boy which has it and he has only young fish, so my friends hasn´t really experiences. I don,t know also, if sajica cichlids are compatibility with adult JAG, they are little and overly paceful I think.