Hey , im at my Witt's end here and just cant get to the bottom of it. My plants are growimg so slow its just not right. 1.2 tent inside of a shed . 600w dual spec light with 6" outake and 5" intake . water around every 3 days once with nutes then next time without . first i started off with crispy yellow leaves , changed the water and they came back to green . iv always struggled with temps , but now its around 21-30 . i have a friend who took 2 of the plants and they shot up straight away and are already bigger than mine ?? Wtf . on top of that his room is actually hotter than mine . the difference is that he is sleeping with his . im using spring water which is at 200ppm ph to 5.8 in coco . could it be co2 deficiency as the shed is closed around the tent ? Any ideas would be appreciated because actually contemplating stopping the whole thing . thanks guys