NY, I would definitely order some pH strips as long as you are placing the order. You do need to make sure the serum is 3.5 pH or less or it will not work.
Keep it in the frig to maintain freshness. The frig lite will go off when you close the door. You could decant a small amount into a smaller bottle and keep it in your dark cool cabinet in the bathroom - decant only what you will use in a week so it is fresh.
Yeup, cheap vodka is fine. It is ethanol. Don't get the flavored kind!
Good luck!!
Keep it in the frig to maintain freshness. The frig lite will go off when you close the door. You could decant a small amount into a smaller bottle and keep it in your dark cool cabinet in the bathroom - decant only what you will use in a week so it is fresh.
Yeup, cheap vodka is fine. It is ethanol. Don't get the flavored kind!

Good luck!!