I have had a blue linkia stafish for over 2 years now and have realized that over time it appears to be losing body mass. Recently it really looks skinny and I fear it is not getting nutrition. I have tried feeding it in the past but it is so slow moving the food gets carried away be the current before the starfish even has a chance to eat it....assuming the starfish would it the food. Books I have read indicate it eats bacterial matter and other tank available food, so I wasn't too overly concerned that I needed to feed it. I have a 120 gallon reef tank. Anyone have any ideas?