Sorry I've only got back to you both, have gad a very busy week, thank you both for your input, we shall eventually get a 6ft tank to better accommodate our tang and other fish that need more swimming space before we purchase them
I think the initial stress of moving from the lfs
and being put into a new environment was the main cause of colour (color!) loss, but as the week has gone on it has really perked up, is best buddies with the clown pair, a big relief!
It lives brine shrimp and mysis but seems to be totally oblivious to the algae wafers I put in there for it!