I have a 120 gallon tank set up for a few weeks. Its stable running with old filter media and i added 160 pounds of live sand and 150 pounds of live and dry rock mixed. Tank is currently stocked with coris wrasse, melanarus wrasse, occel clown, orchid dotty, midas blenny, candy hog, and a long nose hawkfish. Now i want to add two tangs to finish off the stock. A purple tang is a must fish for me ive been researching care and would like to hear from you guys your experience in terms of care and temperament. I would like to also add a second tang simultaneously to reduce aggression. Would a purple tang and a chevron get along in a 120? if not would an achilles tang be alright if added to the tank instead of the chevron? which fish is easier to care for chevron or achilles and are purple tangs easier to care for like yellow tangs?