“General Hydroponics makes a three-in-one package that comes with their formulated FloraGro, FloraMicro, and FloraBloom mixtures. Following the directions on these packages tells you exactly how much to mix to make your nutrient solution. A little more goes into making the perfect nutrient solution, but we’ll come on to that in Chapter Seven. For now, you can pick up a General Hydroponics three-in-one package from Amazon for $35.”