General Hydroponics® CocoTek® Professional Grow A & B 
Put even more power into coconut coir with the Professional formula that makes the most of your amendments. Featuring calcium and magnesium, CocoTek® Professional Grow A+B offers an easy-to-use formula that’s designed to enhance your coir. You can deliver nutrition from growth to bloom, giving your plants the benefits of premium nutrients in addition to the many advantages of coir. CocoTek® Professional Grow A+B nutrient combination brings nitrogen and calcium into the crucial vegetative stage of plant growth.