EDTA & DTPA
VS Gluconate & Glycinate

Pentetic acid or Diethylene Triamine Pentaacetic Acid (DTPA).  The molecule can be viewed as an expanded version of EDTA and is used similarly. It is a white, water-soluble solid.

Magnesium Glycinate and Magnesium Gluconate

Glycinate and Gluconate are magnesium salts of an organic acid and magnesium. Both can be used to provide magnesium in the diet.

95% of nutrient  companies are using EDTA acids as well as a list of many other acids that are toxic to the plant. EDTA is the cheap and old way of making synthetic base nutrients. The future is in Gluconates and Glycinates. Organic based acids. More bio available and easier for the plant to uptake. In the 5% Canna is one of them that has move forward in the bright future of Gluconates and Glycinates.