Ca-Mg-Fe prevents plant nutrient deficiency symptoms, especially where “high pH” waters are used or when nutrient solutions are subject to volatile changes in pH and EC. Ca-Mg-Fe helps prevent or cure leaf yellowing, leaf curl, stunted growth, withered fruit-set and bud rot. Unlike other cal-mags, Ca-Mg-Fe also contains the full spectrum* of trace elements: Many base nutrient formulations are deficient in trace elements. Most nutrient deficiencies are in fact due to trace elements. Many trace element species destabilize when subjected to hard or “high-pH” water however, Ca-Mg-Fe contains alkaline-resistant compounds that cope with pH levels up to 10.*Iron, copper, manganese, zinc, molybdenum and boron Ca-Mg-Fe is 100% compatible with all liquid or powdered base nutrients that are deficient in cal-mag or essential trace elements. Dosage: 1-2ml/L (4-7.5ml/Gal) during veg and flower. NOTE: Avoid using Ca-Mg-Fe with VegaFlora A+B or Veg-1 as these elements are already included and an excess will likely cause complications.