I have a homemade bubbleponics 10 gallon growing autos. I'm confused on adding nutrients to the rez. The directions are ml per gallon correct? Do I add the nutes directly in the rez after calculations? I read somewhere that they are supposed to be mixed in an empty gallon container to be evenly distributed. If I do it that way, do I have to stick to the per gallon measurement or can I mix the total amount of nutes in that one gallon container? I am on the fence on nutes but most likely I will be getting Advanced Nutrients 3 part.