10 gallon fermenter head space question

[MacRellik]

I have just finished the primary ferment of a 5 gallon batch of american amber ale and have decided to leave it sit on the yeast for a couple of weeks instead of racking to a secondary. I am using a 10 gallon plastic fermenter. The kind with the loose fitting lid. Should I be worried about oxidation?

 

[tally350z]

There should be a good layer of CO2 on the top of the beer. You will be fine for a few weeks.