This is my first time with the Aerogarden. I wanted to know what was the best way to mix my Fox Farm nutes and give them to the plants? What is the best way so that the pH level remains somewhat constant? I will be using purified drinking water and my resivior hold just about one gallon; which I think could be usefull in making an exact one gallon mix. I've got Blue Mistic seeds. Thank you for any tips or suggestions.