You could try polyps! LOL JK..any way try frozen foods, chop them up small about the size of an eraser head. Is he still sticky? You could blend up some frozen foods, shrimp and feed it to him with a syringe if he will not hold the food. I would stay away from silver sides..they can't digest them, or so it has been stated many times on these threads and a few books I have read. Personaly I have never tried silver sides, so I'm just going by what others have said. 3 weeks is not along time for anemones sometimes they don't eat but once a month, and if he is sick he probably will not eat at all. Remove any uneaten food, do water changes, check your SG, ammonia, nitrates and nitrites, etc. Hope he gets better for you, but if he takes a turn for the worst, take him out of your tank, maybe place him into a QT..you don't want him dieing in your main tank.
