Canna Coco A+B 5L fan and micro nutrients including iron Size:Gallon and micro nutrients including iron *Firmware Update Note: To update firmware on the TrolMaster's controllers and modules Thanks to the Coco medium’s unique buffering qualities CANNA Coco A&B is used for both the growth and flowering phases Rich in high value elementsA ready to use fertilizer solution is made by diluting A & B concentrates in equal amounts with tap wateris a complete professional nutrient for plants containing all the essential elements for optimal growing and floweringcan be used for the growing and blooming phase if it is used in combination with a quality Coco substrate growing medium (like CANNA Coco) due to the fact that it will interact with the growing mediumA ready to use fertilizer solution is made by diluting A & B concentrates in equal amounts with tap water