I'm sing the full line of earth juice. Last few times the tea develops this vinegary smell. I mix p 20 gal at a time, se air stones. Only change is I'm increasing bloom. (the " " has stopped working on my key board).
maybe it means one of your nutes is no good? how long has it been since you bought new ones? i use earth juice regularly and have never gotten a vinegar smell so i'm not sure, this is just a thought.