Thanks for the help guys, you've started to put me off the fish though!
I currently have 4 small hermit crabs, 2 turbo snails, and soon a blood/fire shrimp.
If the dottyback may cause problems to these then I don't want one! Shall I just try it and keep an eye on him for a few days?
I saw one at my LFS
today, and he was chasing some cardinals around, not nipping, just darting at them. He looked quite mean! But he was leaving all of the Ocellaris Clowns alone in the tank.
I reckon I'll try it and see how it goes, would you recommend putting the shrimp just before then? I was going to get both at the same time, so maybe put the shrimp in a few mins before the dottyback after acclimation?
Also, I really like the open-tank look, it's really clean/modern. And my lights are over-tank's, so if I was to put any sort of lid on it'd spoil the look.
Again, I'll monitor him if he goes in...I may get some sort of thin acrylic lid made up, with a few holes in for gas exchange and to let the heat out etc.