Was just wondering if anyone uses or has heard of any of their products? I came across them years ago and have been using them ever since they are kind of like the herbs and spices of the growing world they make 14 plus products from kelp, humid acid ,Cal-Mag, nitrogen, phosphorus, potassium, yucca ect. You would have your base nutrient, then say you have one plant that needs a little bit more nitrogen or needs a little bit of cal or mag with as little as a 1/16th of a teaspoon you can add that to your base nutrient. Then that plant can get that little boost that it needs. The Man Behind it Harley Smith knows his shit when it comes to plants if you haven’t heard of him I definitely recommend checking him he is a very knowledgeable man.