So, few weeks ago i bought a AFT from my LFS Labeled FATF (i'm pretty sure it's not GATF), the ATF now around 4 inches and last night I added 2x 5.5~6 inches Red tail Barracudas. As first my ATF freaking out when its saw new fishes in his tank but after 30 minutes he started shoal along with cudas and start beating on those 2 tank mates and he much smaller than those 2 cudas. Its also stopped eating too (he was eating like a pig, I fed him live feeders), Is it a bad sigh? or it is a bad combination? (tank size 6x2x2 foots with close to 10000 GPH flow).