I would not candle before day 5. The first time I incubated I candled on day 10 and that was it. Now I usually candle day 7, day 14 and day 18 as they are going into lockdown.Got the incubator set, stable and 4 eggs in for a test. I am sure I will be back for TONS of questions, first off is it day 3 I candle? And then after that hoe often do I do it?