Following is a link to the reagent grade water Albert Porter ordered. One can buy 5 gallons for $50-the issue then is to have some smaller containers to transfer into. While $50 for 5 gallons of water may seem expensive, it is dirt cheap in terms of buying commercial cleaning solutions (and I have found the commercial solutions to be worth their price compared to DIY solutions so I am certainly not a cheapskate). I'm still experimenting with cleaning and steaming ONLY with ultrapure water and no commercial cleaning fluids and beginning to lean toward the opinion that only ultrapure and steaming may actually be the best way to clean records or at least the vast majority of them, and if that is indeed the case, 5 gallons of ultrapure will clean literally thousands of records.
I can't comment on the quality of the linked water as I'm using ultrapure from my wife's lab which essentially goes through the 6 stage process I outlined above in this thread. I know that what I'm using is very pure and I've been really pleased with the results having formerly used the RRL/Mo-Fi products (both Super Deep and SVW). I'm still unsure as to whether I can do without the Super Deep, but I've long since stopped using the Super Vinyl Wash as the Ultrapure Water I'm using is, in my opinion, both a better cleaning agent than the SVW and leaves absolutely no sonic signature like the SVW.
http://www.opticsplanet.net/casco-nerl-water-reagent-grade-9800-5.html