Most of the time I clean forget I even have frozen food in the freezer and feed wafers and veg. For the times I do remember the frozen stuff I have Hikari bloodworm and only hikari as the other brands somehow kill my fish. It goes thru on stilts and only a little bit for each tank not an entire cube of it.
Froze daphnia, mysis, bbs, and brine shrimp are also one hand. What ever I grab at the time. Whole cube for a 3-4ft tank or half for 2fts.
I do not feed frozen food as a staple, only a treat.