I make a lot of one gallons juices in one gallon carboys with air locks. No where close to toilet water! I agree the comment was rude. I do use wine yeast though, usually Lavlin 77B.
I use them for topping up other wines when racking or if not needed for top-off we drink them after they are de-gassed with a vacuum pump.
Last time I attempted a wine in this manner was over 10 years ago. It was more of an experiment. Everything was going very good until (3 months in the secondary) I decided to add some gelatin to clear it a little more. The gelatin (bought at a grocery) must have introduced a bug and the stuff turned so sour that it would cross your eyes.
Good luck. Hope it turns out good. If it doesn't, do not give up. Just arm yourself with more knowledge and try it again. The feeling you get when you have a success is priceless.
When it's done fermenting next week, I'm gonna let it sit a few days, rack it, let it sit rack and repeat till its clear and drink my friend who makes it does not even rack it he lets it sit a week or 2 to ferment then he pops the cap off and drinks