I candled the duck eggs on day seven, after snapping a picture of the eggs for the "how many set" contest (though I need to update it now). I also candled the rest of the eggs again (from other hatches) just to show my brother the different stages of ducklings and chicks, and found that I had lost one of my ducklings that was due next week.

At least it was educational, to show my brother how I could tell that it was dead (he was pretty shocked that I could tell that it was dead, when he couldn't figure out what was going on in there).
The serama eggs confirmed why I don't pull eggs from the incubator even if they show no signs of development on the first candle or two (depending on how hatch crazed I am, I'll candle at 3 days, 7 days and then every few days after, or sometimes I will only candle on day 7 and when they are moved to the hatcher, and sometimes only when I move to the hatcher). Anyways, I had six serama eggs developing and a clear egg on day 4, since they were shipped eggs, but the next time I candled, the one clear egg had a little pink blob in there. They're all developing strongly now.