Yello Tang Compatability Advice

Hello All. I have 2-3" Yellow Tangs and 1-2" Blue Hippo currently in 29G QT. I was hoping for the YT's to get along but not happening. After the first day in QT, I separated them with a divider. The divider was left in for 2 weeks and I recently removed the divider and they went right back to aggressive behavior. I'm on my 4th week of QT and I'm nervous about adding them to the 180G DT. There's plenty of caves and rockwork for hiding, but I'm afraid to cause a stressful situation. Do you feel I should take 1 of the YT's back to the LFS? I also plant to complete my fishload with a Powder Blue Tang, Naso Tang, Sailfin Tang, Bluejaw Trigger, and Zebra Moray.



180G DT

75G DIY Sump w/ Refugium, 7" DSB, Chaeto

6' Hamilton Light Fixture, 3-250W Hamilton MH, 4-60" T5HO, LED

Neptune Apex

100# Pukani Rock

2-7" 100 Micron Filter Socks

Aquamaxx Cone-S C03 Skimmer

Emperor Aquatics 80W UV

3-Vortech MP40's

Sicce Syncra 4.0 Retrun Pump

Current Fish Load, Percula Clown pair, Red Coris Wrasse, Cleaner Wrasse, Leopard Wrasse, Domino Damsel, Longnose Hawkfish

Various SPS Frags