I have a 29gal reef tank with a 20gal sump. I planned a peaceful tank but ended up getting a six-line after an isopod took out another fish. I got it hoping it would eat the rest if there were any others. He was all happy until today I added a pair of clowns. Within seconds of adding them he was attacking them. It's not just a nip here or there he's constantly chasing and nipping them even during feeding. I guess since he had the whole tank to himself he thinks it is all his. Should I banish him to the refuge so he forgets his territory? If so how long? Or should I just move him over to my brothers tank that has more aggressive fish like a dotty back and damsel? Any advice please, don't want these beautiful designer clowns to get stressed and die.