CYCO Bloom B, 20 LiterCYCO Platinum Series Bloom B CYCO Bloom B is the second of the two parts to make up the base nutrient system for the flowering stages of a plants growth. CYCO Platinum Series Bloom B is a primary source of phosphorus and potassium which are vital for photosynthesis. Phosphorus is a vital component in manufacturing adenosine triphosphate, a primary unit of energy manufactured by photosynthesis that is then consumed by the plant to carry out necessary