Been working my way up. Using potting soil, with nutrients, seedlings at 1 teaspoon per gallon of grow big for the first couple of feedings. I feed once a week, sometimes more, depends on how they look. In veg stage, I do one teaspoon per gallon of cal mag plus, almost every time I water. I'm into 3 weeks flowering stage, so no more cal mag. and now mixing in 5 gallon buckets of water, last feeding 6 tablespoons of grow big and 1 teaspoon of bio bloom. Was about 600 ppm. A week later, which is today, I gave the 8 tablespoons of grow big and 1 teaspoon of bio grow. Was about 700 ppm and pH about 5.5, which drains out at 6.5. Before adding bio grow, my pH was a bit high. I have to adjust it low, because I don't adjust my water. It's well water, about 50ppm and pH 7.0. my plants also gets rain water from time to time, which pH is about 7.5 so I feed a little low on the pH. BTW, most of my plants are in 7 gallon fabric pots. Because they mold underneath, I have to move them around and clean it. Just saying, my last time using them. Lucky I'm basically outdoors, or can spread.