I have a rosé hip mead in a 5 gal carboy and after racking it there is a lot of head space. I was wondering if I could just add CO2 in the space to prevent it from oxidizing or will that effect the taste of the mead?
If in doubt, I've heard you should top off with a similar mead, or maybe even just plain water. The CO2 will eventually disapate. How much space is there?