Blowoff tube blew off!

[512Brew]

Just came back from 3 days of Xmas vac to find my blowoff tube blew off the top of my 10gal. ferm. Not sure how many days it was exposed to open O2 thru the 1/2 hole on top, but i've never had this happen. Think it will effect the beer much?

 

[509inc]

If it still had Krausen I would not worry.

 

[OLDBREW]

no problems even wihout krausen. there is plenty of co2 covering the wort and head space. yeast eats sugar and spits out co2 for a living