I was thinking of putting either some Campo Cichlids, Geophagus species in general, Stripetail cichlids, Pindare Cichlids, Ngounie Cichlids, Amazonas Red Cichlids, Steiney Cichlids, Rainbow Eartheater's or Devilfish cichlids. I'm not sure which types I'm going to get, which quantity, or which fish I'm going to put together. They have the same water specifics as the cory's, shark, and kuhli's. Also, Are There Any Single Color South/central American Cichlids That Don't surpass' 6-8"?