Emerald Harvest Cali Pro Grow A (15 US gal / 56.78 L) is a high-quality base nutrient designed to support vigorous vegetative growth in plants. As part of the two-part Cali Pro nutrient series, it is formulated to be used alongside Cali Pro Grow B to provide a complete and balanced nutrient profile. This professional-grade formula is ideal for both commercial cultivators and home grow... https://www.hydroponicstown.com/cali-pro-grow-a-15-us-gal-56-78-l