Sensi Bloom A & B is a unique bloom stage nutrient formula made by Advanced Nutrients. It has a PH perfect technology incorporated into it meaning you do not need to measure or modify anything to stay within the perfect pH range. Miraculously it can bring a pH of 8.7 down to 5.5 in a matter of seconds. Or, it can raise a lower pH of 4.8 up to 5.5 in the same time.
Tip: You will lose the PH perfect technology if you use any other brands products