I'm not latewood, but yes that is what he recommends with this recipe. So mix your initial nutes, then after your girl has drank some water, mix a gallon of water with calmag or LK depending on which week it is, Ph balance and refill rez to initial fill line. I do this until I have refilled with the exact amount of water I started with then I change my Rez). Easy Cheezy.(if its earlier in the grow the plant might not drink as much water so use your judgment) Stop using LK and Calmag after week 5 in flowering. Peace