Hi im using a 400w hps cool tube and its hooked up to an inline fan and a filter that exits outside of my house. I have two windowos open at the bottom of my tent for fresh air intake. I also have a circulating fan blowing at my plants 24/7 and a led panel for suplumental lighting. I never have any heat problems so im able to keep the light close to the canopy without burning any plants. I never had any problems or deficiencies trew out the whole grow using the full line of FOX FARM nutrients. They smell gd and look frosty but NO growth in size, their in the first day of the 4th week of flowering. What am i doing wrong????? is this normal???? can anybody plz help????