Roots Organics Nitrogen Bat Guano 9 3 1, 44 lb. Irrigation Tubing This is an advanced meter It produces an immaculately This is an advanced meter while maintaining simplicity you had to risk starving your plants of these critical nutrients Many growers tried adding extra Ca and Mg using cal mag supplements but its hard to dial in the ratios just right The fact is only the highest quality Roots Organics Nitro Bat Guano encourages vigorous growth and is fast acting for quick results All of the Roots Organics guanos have been carefully sourced for quality and harvested with bat friendly methods so you and your garden get performance with principles