Sensi Grow A+B 4L
Sensi-Grow/Bloom A & B is a two-part base nutrient formula that is ridiculously easy to use. You just measure the two parts, according to the mixing instructions on the bottle, and voilà. You can get on with your life. And because Sensi-Grow/Bloom A&B includes pH Perfect technology, your pH will constantly be maintained at the perfect level for optimal growth.