I think there's a new guy at the local chain LFS. Aparently he's been in fish for a while, I don't know if he owned an LFS or worked there for a number of years. Anyway I talked to him for a while. The most interesting part of the conversation was when he bragged that he injected O2 and nitrogen into his tank. I was very intrigued by this statement and proceeded to try to find out more. He sorta trailed off stating that he didn't understand me and I wasn't making any sense.