There unfortunately does not seem to be many books along the lines of what most of us on this list would be looking for. Academic areas that study water chemistry are Geology, Environmental Science and Agricultural Science (Soil and Aquaculture). Swimming pool books actually touch on a lot of good stuff too. But of all these, the Ag people deal the most with practical applications and modification of water chemistry. People such as greens keepers, sod farm owners, nursery people and fish hatchery workers are the people you want to get to know as they work with buffers and pH modifiers all the time and can spew info on carbonate hardness for hours. They don't seem to write too many books though! I could give you a list of the text books but you can find them just as easily by searching the web. I have read (or skimmed) some of them and they are probably much more technical than you want as you mentioned. That being said, I've heard the following book contains a good practical overview of freshwater chemistry management, along with other stuff: Fundamentals of Aquaculture: A Step-By-Step Guide To Commercial Aquaculture by James W. Avault, Jr. I am trying to get a copy through the library to check it out but if anyone beats me to it please report back. - -Doug Brown debrown@kodak.com