Hi, I have a 2-3" Maxima. I feed my fish a variety of foods, one of wich is a product called Zooplankton. Well while feeding my fish this stuff, I saw a few pieces land on the clam. Before they actually even landed on it, it just sucked the tiny pieces in. It was almost like a tiny vaccuum turned on. Then the pieces just disapeared. Since then I directly feed this to my clam once in a while. HTH......................Jeff