Yeah, he's an awesome fish, I'm picking up the whole tank tomorrow. He's sharing the tank with a small lion fish and a blue crayfish. They have all been together quite a while now, I think the grouper's about 8 years old. I had a thread going about it earlier, with a lot of questions, but maybe too many? No-one answered! There's a divider in the tank, and on the other side there's a few smaller fish, Harlequin tuskfish, a sand sifting goby, a tomato clown and a couple of others. I think I'll house them all in my spare 55 gal tank and give the cod (In Australia we call groupers Coral cod), lion and cray the 240 to themselves. Thanks for your help!