I am using H3AD'sw 6/9 formula using GH micro/bloom. To mix it properly, I have to make up much more than I use daily. Can I save the nutrient solution I mix up, if I can, for how long?
Get a 5 gallon bucket or larger and a small fountain pump or airpump w/airstone. As long as the resivoir your mix is in stays aerated and cool your nutes will stay good. I use a 50 gallon barrel and mix mine 30 gallons at a time, usually lasts me a week or 2.