3rd grow, and this time have took ph of water more seriously and have kept in where it needs to be. my 450w light has been about 1.5foot away and air in and out are fine, fed every 4 hours except when in dark. temps maybe a little too high but previously been about the same (high 30's) and have had results. my tent is 1metre x 1 metre and 1.7 high and its aero. ........any ideas whats going wrong. should I start in soil then switch to aero??? .......PLEASE IN NEED OF DESPERATE HELP. AS I DONT WANT TO HAVE WASTED 3 WEEKS..... (