gtriamy, I find it's easiest to feed mysis shrimp because I have more control over the food. You can't just put the shrimp on the ric and just let it be IME. I coax my rics by moving the shrimp around its tentacles to let it know there's something on it that's food. Within a few seconds I usually see it start to fold up to move the food to its mouth. I have to wait for the food to be eaten by the mushroom before I can take my attention away from the mushroom because I have a Six-Line Wrasse and a Cleaner shrimp that'll take the shrimp from the ricordia if I don't guard the mushroom. It's kinda annoying, but it makes me feel good to know my mushrooms are getting more food sources than just light.