The whole idea behind a 3 part system is flexibility.

I'd use the online directions, as some manufacturers label the products as a stand-alone nutrient or additive. Which is strange, because AN is a known cannabis nutrient. They should know better.

But it doesn't surprise me, coming from a company that sells a product for everything that ails you, and they also sell the products that fix the problems that arise from using the first product. Don't fall for their marketing and flashy labels. Most of the products they sell are unnecessary. Some are nothing more than a derivation of a synthetic or organic molasses.