A white purple tipped BTA please post a pic that must be awsome to look at!!
As for food I feed mine a variety of foods frozen mysis shrimp,and meaty medely, krill,and sometimes I find if an anemone is being fussy they will take flake food I use ocean nutrition prime reef. They say you can soak the food in vitamins,garlic, etc. but I find when I do that the anemone pull away from it I think although it's good for them it's like giving a kid medicine! so I keep it plain but always float the food in a container with some tank water in it so its a good temp and more natural for the anemone!!
GOOD LUCK I love my anemones my BTA is probally my favorite in my tank right now!!!
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55 Gal. REEF 4"D.S.B. 60-65 lbs. live rock, 330 bio wheel, aqua clear 500 and 304 fluval canister with S.C.W.D. & Natrural Wave maker with maxi-jet P.H.'s. Remora Pro w/Mag 3. CRITTERS Spotted Long Tentacle Anemone CORALS: Frogspawn, Pagoda Cup, Shrooms, FISH
urple Pseudochromis,and 2 perculas
http://www.3reef.com/uploads/1mason.jpg 
Re: Aclimating anomones 
