When do I do the float test on coturnix quail eggs?

[SeptemberQuail]

Yay, I'm on day two of incubating (day one, we put the eggs in in the afternoon, no turning - started the turning craze today.)
Temperature is stable at around 37 degrees, sometimes varying between 36 and 38. Humidity remains at 40 % - 45 %

It's my first time incubating eggs. We made our own home-made one with styrofoam.

So I'm just wondering, what day during the incubation period is when we do the water float test? ^-^
Candling is just too tricky with small eggs like these (for me.)

Thanks.

 

[fried green eggs]

Eggs can sit at room temp for quite a while before they would float so, I think try getting a really strong and small flashlight and hopefully by day 7 you should see some veining in candling. Good Luck!