General Hydroponics Diamond Black LED Grow Lights and iron supplement specially formulated

and iron supplement specially formulated to support vigorous plant development and prevent common deficiencies

Achieve superior flower quality and yield with General Hydroponics MaxiBloom® — the complete nutrient solution for blooming success

or temperature fluctuations

Shutter frames come with pre-punched mounting holes for easy installation

172 GPH thru 370 GPH models include a 6 ft 120 volt power cord

General Hydroponics Diamond Black LED Grow Lights and iron supplement specially formulatedDiamond Black is derived from 100% pure mined Leonardite, a naturally occurring form of carbon drawn from prehistoric peat bogs. Containing an exceptionally high percentage of plant active humates, Diamond Black supports beneficial microbial activity in soils and increases micronutrient availability. Diamond Black can be added to all kinds of garden soils and potting mixes and used with a wide variety of plants during all phases of growth. Free