Growing Edge Technologies has built their Let’s Grow A & B and Let’s Bloom A & B, with certain manufactures fertilizer salts. G.E.T. owners have been building hydroponic plant foods for over 25 years and have tried the same formulas with different manufactures fertilizer salts, achieving different results and now we only build our plant foods with these proven mineral salts. And when you use our formulas G.E.T. knows that you to will notice the difference in your favorite crops.