Quote Originally Posted by stinkyattic
Remember just because it is sold by a 'hydroponics' company does not mean you can use it at max efficiency in a hydro system- this is about pH ranges. They are NT the same for soil vs hydro applications. The actual bottle needs to say basically THIS IS FORMULATED FOR HYDROPONICS. IF it doesn't, you might still be able to use it, but you WILL have to fiddle with the pH.
Fox Farm does have a nutrient specifically for hydroponics .. they recently added a 'hydroponics version' of their 'Grow Big' (3-2-6), soil version is 6-4-4, and their granulated fertlizers are pH-balanced, buffered ... it says so on the container, anyway, I didn't 'run it through my lab' ... my plants are loving the stuff