MAKE SURE to stir the dm silica when adding it to the rez. It seems super concentrated and will form a white precipitate cloud and possibly lock out nutes. Its works, but be careful and stir when adding. I have since moved on to humboldt nutrients. I have better experiences with their stuff. Dutchmaster is a class of its own with all of the foliar stuff they got goin on, but if your not the guy that wants to spray his plants every single day like they reccomend, then i suggest you try humboldts line. Organic and synthetic work great. Im pretty sure the guys that founded it worked for Advanced nutrients for some time. Could jus be rumor tho. Humboldt Master A and B is pretty much connoseur but 30-40% cheaper depending on where you get it. Best amino chelated 2 part nutrient for the cost imo. But hey, you can get amazing results with just about any nutrients as long as you know how to use them. Being chelated def helps tho. You dont need to add as much food because the nutrients dont combine in the res and therefore are more availiable in the correct form for the plants to uptake.