Odd/Angry Tang Behaviour

[SmallFry]

Thanks, I'll make sure there's always some in there and see if that helps - he didn't go for last nights piece but I had probably filled him to bursting point with flake, new life spectrum and mysis before I put the nori in. The coral beauty enjoyed it though..
He was picking at the rocks and I did also clean the front and side glass recently, but I always leave the back for him..

I'll see what he's up to when I get home from work this evening I guess..