My best thing: Blue Mountain Organic tonics.

I use either local river water, fish tank water, or spring water and my plants seem to do very well with it. I live in the mountians though so all these types of water are easy for me to come by, that being said I would still buy spring water unless I just had to large of a grow to support it cost wise. Even if it does not adversely affect the plants growth, there is no need for those chemicals so why bother messing with them?

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Usually high and randomly browsing threads so don't expect a reply beyond my original post as I've most likely forgotten I ever posted.