I stopped using General Hydroponics when I found out they were associated with Monsanto, who supplied shiploads of Roundup, enhanced for military use, allegedly to eradicate coca fields in Colombia. It doesn't actually kill coca, because it's a woody shrub that puts out new leaves. The real purpose was to kill food crops and farm animals, make people sick, and poison water supplies in guerilla-held territory to weaken opposition to the friendly government. Admins: please delete if this info is too political.