When you have selected your nutrient and additives if you are using them. Have a clean reservoir then add the water. A little tip if you are making up big batches is to use a pump to stir. Preferably a strong pump so you can add your nutrients and it get stirred up within seconds.
Measure equal amounts of nutrient? A & B solutions and then add them one at a time waiting for a few seconds or minutes (if you have a small pump). When these are mixed well add your additives. Then check the PH and adjust. A safe range for PH is between 5.5 and 6.5. A safe range for the nutrients is between 1.2 EC and 2.5 EC depending on the plant. Always use a weaker mix first if unsure then increase slowly so as not to burn the plant. An instrument for measuring nutrient is called a Truncheon and will save you money on Nutrients plus save plant burnings.
Thanks for reading and we'll be back real soon.