Couple people recommended feeding directly to the top of the medium and to use it as a foliar as well. It's been working so far and I believe it is what helped turn my pH problem around. Recharge jacks my distilled water up to 9.0 pH but several, including the company that makes it, told me to apply it as is and the microbes will do the rest. I plan on using it with the BioTabs as well when I start that grow around the first of April.