Still on the smallish size -- might not be an issue, but just something to keep in mind if it starts to looked stressed.
BTW, I would try frozen krill or PE Mysis shrimp instead of the silversides. Myself and other experienced anemone keepers have lost otherwise healthy anemones after their use. Plus, the anemone appears to be an E. quadricolor (( BTA )), they naturally eat very small pray items.