yup, add more of A than B for veg and more B than A for bloom. so simple, so easy, and yet these two bottles contain EVERYTHING that is needed. So i will see how they compare to heavy 16. i was getting the dutch master gold for 10 bucks each bottle and the guy said you're choosing that over floraduo and he went into a big explanation and how its only 7 more bucks for way better stuff. so i am pleased. it looks like the baby has the best chance its had since germination at growing lol. its suffering from cannabis growth deficiency syndrome and so stunted for being 4 months old lol.