Growth Science Base B MH & HPS Grow Lights potassium and calcium in a

potassium and calcium in a true solution

5 X 108 CFUs per g

Fiberglass

Using the Master controller safeguards your valuable crop by the added auto-dim and auto-shutdown features

But if you came here after reading Fox Farm Big Bloom reviews

Growth Science Base B MH & HPS Grow Lights potassium and calcium in aGrowth Science Nutrients Base B Growth Science Base B provides your plants with magnesium, phosphorous, and potassium. Base B is used in all stages of growth. For use in soil, coco, and all hydroponic mediums. Provides macro and micronutrients needed in all stages of growth. Base B provides phosphorous, potassium, and magnesium.