For the Purist in you. These products follow Jacks Jack's 12-4-16 Base nutrition schedule and contains formulas designed to add back all the beneficial nutrients your plants need to grow and thrive. Targeted to achieve the optimal nutrient balance for water sources that have low concentrations of calcium and magnesium (40 ppm Ca/Mg or less). Add the Jack's Clone formula as well if you want to give a boost to your seedlings or clones.
See the nutrion schedule (Jack's 12-4-16 Base) on Jack's website for more details.