What a weekend, brought home the YT, all doing well no aggro, an hour later decided to buy the Regal Tang, again no probs. Sunday morning I was up early before the lights to see the YT being bossy with his tail to everyone, sorting pecking order he is now the boss, then I noticed my Regal Angel went into hiding, not done it before so I guess he is timid of the YT. He does appear for a few minutes and feeds well before hiding. I wondered if he was ill or frightened, I decided as a caution to treat the tank with polyo lab medic to eradicate any ich that may arise due to stress. Day 2 of treatment today. The Regal Angel does appear for longer periods, still eating and grazing, he looks fine, in fact he is out and about at this moment, the YT has ignored him so I guess it's just a matter of time before the Regal Angel gains more confidence in sharing space with the YT.