Wow. That was a lot of posts and seemed like a bit of anger. It also seemed like I had 30 billion different opinions on this, so I will show my own and try to answer all questions. (Here we go...)
Fish wise, I will be getting 1 Angelfish, 10 Rummynose Tetras, and 6 Sterbai Cory Cats. Also, I appreciate the "going the extra mile" compliment.
I do realize that 6 gallons will only do a 16% water change, but if you read my 36 gallon thread, you would realize that I'm using a lot more filtration then I have to, and that would cut down on water changes. Also, my Alkalinity is moderate, and I would prefer that I don't have tea colored water, but since I already bought supplies and the system is up and running, I'm not going back. Also, 30 cents a bottle will really add up over time and I've already spent near $500 on supplies (My wallet is getting pretty thin). Also, if the pH starts to drop (probably won't), I'll add some hard water to even it out. Also, I greatly monitor my waters parameters.
Finally, I can't collect rainwater because winter is starting and we already have 6 in. of snow, so no can do on that.
I think I answered all questions (hopefully).