Athena Pro Core provides strong baseline nutrition across all stages of plant growth. Nitrogen to assemble chlorophyll and amino acids. Calcium to build structure. Essential microelements to catalyze photosynthesis, enzyme production and a multitude of important plant processes.Readily available Nitrogen, Calcium, and essential microelementsFully soluble dry fertilizer, no particulates or sedimentWorks with any dosing system: Dosatron, Netaflex, RhythmMixes completely at room temperatureLow heavy metal contentIdeal for mixing stock tanks and compatible with all dosing systems. This large-grind mix is 100% soluble and will not clog irrigation systems or leave sediment in reservoirs.Mixing InstructionsAlways use in combination with Athena Pro Grow or Pro Bloom. Measure by weight, not volume. Do not combine in dry or concentrate forms.Stock Tank: Mix at most 2.5 lbs per 1 gallon water, agitate well until dissolved. Dose at a rate according to desired solution strength.Reservoir: Mix at 60% of Pro Grow or Bloom. See dosing chart for target EC mix rates.