I see 'bait buddies' and 'liquid oxygen' supplements. Can I use these to oxygenate the water to give the yeast nutrients when starting mead fermentation? None of them really say the actual ingredients. Do they leave behind additives? Are they food safe for humans? I imagine the 'liquid oxygen' supplement is, but that product description uses words in an entirely different way from their normal meanings. Liquid oxygen is freezing cold. If it means oxygenated water, how does it not degas during shipping? How many drops would I need for 5 gallon fermentation?
What about magnesium oxide? I know magnesium is safe to drink. Does the oxygen dissolve in the water?