do you have any experience with an Achilles Tang ? i have been offered one that has been in a tank for at least 4 years and he is very healthy i plan to put him in with my medium blue hippo tang and large yellow tangs (i am thinking of moving my big hippo blue out to the fowlr) do you think this will need to be done? the Achilles is in with a orange shoulder tang and a white cheek tang...i cant pass the price up and i alway wanted one