Ok, so I'm growing some veggies am wondering how you can get C02 tanks without suspicion. This is for the tomatoes in the basement, but if someone asks, then they will probably think I'm growing weed of course. Anyway, how can you get c02 without setting up an official account with someone. I'd prefer to pay cash you know? If anyone could share what they do it would be great! Also, I have heard of natural methods of creating C02 without tanks or natural gas. Has anyone used another method and if so, was it effective? Thanks a ton for anyone who can help!