I like the look of flagtails and it seems borderline if it is possible to house them in a 125. My current stock is 3 catfish, synodontis granulosus, platysilurus mucosus, hemibagrus oylroides, and a senegal bichir. So he would either be the lone topswimmer or I might add some tiger silver dollars. Would this work or should I look for something a bit smaller?