This was the first official week we started the nutrients. Wanted the roots to grow a little more before adding the food since they didn't take to the grow sponges we started them in. We are using General Hydroponics Flora Series. Nutrients calibrated for 4 gallons of water: Flora Micro (1tsp), Flora Gro (1/2tsp), and Flora Bloom (1/2tsp). All 4 plants are doing great so far and are rooting nicely.