After being on this board for a mineute, I would not feed My anemone silversides. A few people think feeding silversides may have lead to the death of their anemone.
1 Silversides are large, the anemone has to use a lot of energy just to break down and eat the food.
2 No quality control, rotting, old, and just bad fish may cause the anemone problems.
It's best to buy sea food at the market, and freeze it. When feeding cut the food up. The more you cut it the better it will be for your anemone. Would you hand a baby a fat chunk of steak?
I just feed silver sides to my brittle stars now.
This is just my opinion, and what I learned from others here. My anemone is just to important to me to take any chances with.