i have the test strips my ph is between 6.2 and 6.8,im using a general purpose hi-yeld brand fert20-20-20.i thought ive read here that many people have started in soil and switched to hydrodwc.someone even said that they have grown with a hydrotron layer on the bottom and soil on top correct me if im wrong.ive been reading almost everything on this site and others everday since june.its just my first attempt at hydro.im from a small town and the only place i can even purchase anything is kmart and walmart.i have 4 26watt cfls which did a great job on my last grow which is almost ready to harvest.