Egg Tub Question?

When you put your steralite tub in the incubator with the eggs in it does the tub need to have any holes drilled in it for air flow? If so about how many and what size drill bit do you use? Thank you :D

I do not use air holes; although, I do open the tub once every seven days for gas / air exchange.

No air holes..

Like Eddie I open the tubs to candle them and it gets them fresh air. :D

What he said.