ADVANCED NUTRIENTS - PH PERFECT SENSI BLOOM A+B 2X - 5LThere is a new base nutrient formula that has a built in safety net, guardrails along the pH highway, that will perfectly maintain your pH without any work on your part. It will do this 24 hours a day, 7 days a week. That means no more pH ups or downs. Ever. And all you? ve got to do is pour it in. It? s actually 5 different premium products in 1 bottle (Wet Betty Grandma Enggy? s H 2 Grandma Enggy? s F 1 20L Form Amino Acids Sensi Bloom Grow A&B).