Hi Branden,
Please post a pic of your anemone. If you cut the foot off it is more than likely going to die. Generally, you want to cut the power head off and let it work its way out on its own. What kind of anemone is it? It was probably dyed the color yellow unless you have some kind of non-hosting species. They dye them yellow to make them pretty but this is very stressful to the anemone. It would of been a long, difficult road to bring it back to proper health especially if you don't have much experience with anemones.