so i have heard, but it worked great for the last set, i will see if the hydro store has some seed starter soil. i know my water ph is above 7.2 because thats as hi as the tester i have goes, so i will tone it down a bit and only adjust it to just blow 7 or so. thanks for you help stinky, you helped me on my last set of clones and they are doing great now!