You guys can do what you want but I won't ever use their overpriced junk again. About 5 years ago I bought into their whole marketing scheme and got almost the entire line of products. I spent about $500 as well as about an hour every two days playing chemist. I had the chart, paper, pen, calculator, graduated cylinder, pipet - everything but the lab coat. I was also doing a soil grow side-by-side, using nothing but Fox Farms Happy Frog. The soil grow was better all around than the hydro that I spent so much money and time on. Just a voice of experience here my friends. Looking back, switching to a *simple* two products was one of the best decisions I've ever made (as far as growing goes).