Jacks Professional 17-4-17
Jacks Pure Water LX fertilizer blend is for grower's desiring a 4-1-4 ratio for pure water. This formulation will not cause pH crash in media. Calcium is supplied at 3% with magnesium at 1.5% to add what pure water does not supply. 17-4-17. 25 lbs. Photo shown is representative of the packaging but is for a different blend.