you sprouted them in soil, then moved them to your hydro system? you live in a city with no other gardening shops eh? me too, and it sucks. lowes, home depot, wal-mart, all are great for building your setup, but they have NOTHING for nutes, soil, etc. They must have a contract with MG, because its all they sell lol. i bought some Scotts Premium Topsoil (scotts and MG are a paired company i think) and mixed it with the MG perlite. no problems too bad yet with my plants, but i'm gonna order some stuff off the internet soon. the MG potting soil continuous feed worked fine for me too, but it was full of bugs. if you get that, you should sterilize it in the oven before you use it to kill the eggs. i know i've read a thread about doing that on here somewhere, but you dont wanna get it too hot or the soil will be doneski. hope i helped a little.