So I tried feeding daphnia today! My fish seemed to really like it, though he was hesitant at first!
I used a dropper for the whole thing, but next time I plan to use a toothpick. I used the tip of a dropper to scrape off some of the daphnia. The dropper again to add a little tank water to thaw it. Then the tip of the dropper to feed a few to him at a time. I think he ate a little more than 10 of them. They're really tiny though... I wonder if that was enough =\
The dropper is also useful if he doesn't notice some - you can pick them back up so they don't float around.