I have a rose bubble tip anemone in my tank that won't eat. It was very nice colored and healthy. Now it's small and lost some color. It moves around a lot and I can't get it to eat anything. I've tried mysis, krill, silversides, pellets and it won't eat any of it. When I give it the food it grabs on for a second and then lets go. Any suggestions on what to do here?