I think my mother is finally going to let me set up my 180 gal. tank . In my overstocked 55 gal , i have a 6 inch butti , 5 inch red devil or midas , a pleco, and a 4 inch pike cichlid . my question is will they be alright in the 180 gal and can i add more tankmates and does anybody know any tough cat fishes that will hold there own in an aggressive tank.