Every time I have a nutrient deficiency with my plants, I have to ask the same questions and I'm sure that a lot of other aquapons feel the same way. I thought, wouldn't be nice to have an alphabetized list of minerals etc that people have used and I will do as much research on that element (with everyones help) and I will compile all that info and then eventually print it out and I will try to post what I have. I'm open to any feedback that any of you have? Let me know of any thing you've tried and your results. I will be looking at the name of the mineral and any generic names, What it will do to your PH, How it can or will react to other ingredients in your system, Where the ingredient can be found. Some of this may require some experimentation