I made a little tutorial on how to brew wine cheaply and with no brewing odors. Everything must be sterilized, otherwise you risk projectile vomiting or poisoning(botulism). There have been issues in the past where the balloon would leak bacteria into the wine even though there is a good seal, the activated carbon both absorbs odors and any bacteria that attempts to enter the balloon. You can use fishtank carbon. Taste will vary depending on how long you brew and what type of yeast you use. To stop fermentation process, refrigerate wine. This wine is ready to drink after 3 days, would recommend brewing 2 weeks+ for higher alcohol content and better taste. Since you are fermenting fruit juice, it is impossible to produce methanol. Have fun and drink responsibly!