I'm not going to take a chance and am going to try either Top Spec or Equilibria, though probably Equilibra as there seem to be a lot of people happy with it and its a lot less to buy than the others.
Just went to my local feed store to get some Blue Chip (didn't have any) as thier website has been withdrawn for not paying something or other. The man at the store said he wouldn't be surprised if they had gone as they apparently have a big problem with mite which is why he hasn't got it...