We tried putting the foxface and yellow tang in the qt tank thinking it would help and put them back in after a day but they keep pushing & nipping at the hippo. Right now the hippo is in the qt tank for now but we still want him in our 150g tank.. Ive seen yellow and blue tangs with foxfaces together before in tanks that get along great..is there any other way I can get all them in one tank without being aggressive or do I just have to keep the hippo seperated?