Again, thanks for the replies!
It ate the whole piece, it was probably close to 1/3 of it's size so I guess that's OK. The stalk was blown up all day after eating it yesterday but it's back to normal now. I appreciate the info on feeding 1/3 of anemone size, that will save me a lot of guessing, but how often should I feed that amount? Until yesterday I hadn't bothered directly feeding the *curly cue* at all and had been dropping fish pellets to the flower anemone on a daily or bi-daily basis. I'd imagine krill is better, I have freeze dried krill and mysis but the krill are easier to feed since they are bigger. They seemed to love it, but they also seemed to love pellets and flakes. My flower anemone was much brighter, mostly white with some tan when I first got it now it's mostly brownish/tan with some white and its not quite as attractive, not sure if it's just blending with the environment or poor nutrition.