questions about secondary

[kf4ocj]

I brewed a Mexican cervesa kept in primary for 2 weeks and decided to rack to secondary,never tried this before and thought I would this time.I use star san for sanitizing.Now to my question,evryone knows how foamy starsan can get and how you should not areate your beer when transferring to secondary just wondering if the foam from the starsan on top of my secondary could introduce O2 to my beer while in secondary causing any problems,it has about 3 inches of foam on top

 

[Double_D]

Give this a read.
https://www.homebrewtalk.com/f39/dont-fear-foam-305803/