I really doubt that your GF won't notice such a bump up in size
.
WHY is it that we have to sneak around our hobby??
Often times, I get home from a LFS, loaded down with bags, and if I don't find my Hubby's vehicle in the garage, I go,*phew!*, rush into the house, and start a drip, hoping that he won't walk by the tank before the acclamating is done!
Or, that's why I carry around a huge tote as a purse now, better to hide little bags in!
Good luck with your upgrade. John.