I have bought a small black nasty cichlid(N.Haitiensis), for my 90 gal..African cichlid tank..yes african cichlids..they are bigger.lol, and I was wondering if you kept these guy's how was it like and are they aggresive? I have researched these guy's and I didn't get that much info...I also got a 7 inch N.beani cichlid..for my 220 gal..Everything is fine in the 220 gal..but the 90 gal is a little fiesty, because my auratus cichlid is bullying them all, I hope the little black nasty will get tougher..Thanks