Mysis feeding and anemone



Every time I defrost mysis it breaks apart into inedible pieces, even for the fish, and spreads around the tank. Is there any way to stop this because it gets into rock crevices, feeding the algae instead of the fish.

Also, I'm thinking of getting an anemone but need to know if I should do any checks before looking for one. I have a blue-spotted puffer but I think he'll steer clear of it since it packs a deadly punch.