The cost of making the RO water for my self mixed two part nutrients cost more than the fertilizer it contains even when mixed to a high EC (2.7). Even the most expensive nutes made with a load of amino acids should still cost no more to mix than about $30 a gallon for a 100X concentrate. If you make your own RO water with a standard small RO filter it typically takes 4 to 5 gallons to make one gallon of filtered water. If it takes five gallons at 3 cents per each filtered gallon of RO water and you run high EC hydro nutrients with amino acid mixed your self the cost of the water would 1/2 as the fertilizer used.
If using an AN nutrient with amino acids the fertilizer would cost over 8 times the cost of producing the RO water used to mix the nutrients. Kinda gives one a bitter taste in the mouth when you look at the AN price of over $125 a gallon for a formulation with amino acids. So no matter how you look at it, the cost of using a AN formulation with amino acids is about four the cost of mixing your own. Or look at their cost of amino acid supplemented fertilizer versus regular fertilizer and realise it costs merely $25 for the amino acids. Go figure.
Amino acids:
http://www.super-grow.biz/Amino.jsp
In case you did not notice though the amino acid is about 45% ammonium chloride. Which means about bout 22% ammonical nitrogen. This means if you add the acid mix at half strength you will be adding about 110 ppm of ammonical nitrogen to a hydroponic solution. To keep the ammonical nitrogen below the typical maximum recommended for hydroponics you would need to be using one of the high nitrogen fertilizers such as Dyna-Gro Foliage-Pro or some other with a 6% or higher nitrogen analysis. For soil grows it would not really matter. Or simply lower the amount used to less than the maiximum recommended strength. Often a wise choice anyway with hydroponics.