Magnum with Vitamin B1 is a potent magnesium supplement for preventing or treating the magnesium deficiency that often appears during bloom. Chlorophyll deficiency in the bloom stage causes fading leaves right when flowers are putting on mass at a rapid rate. Magnum will keep a plant’s energy factories optimized and the B1 helps relieve the stress caused by high performance bloom formulations.

This product is also available in 15 gallon, 30 gallon, and 55 gallon drums.