Hello my dear fellow growers, i am having a problem, so far i been growing in tent but recently converted my loft in to little grow room, i got cooltube with 2x 600w hps but only 1 bulb is running atm, 50% humidity, around 28C, plants are now more than 2 weeks old, at first they were looking very good but stopped growing 10 days ago and i dont know what is wrong, I am using flood and drain system, Canna Aqua A+B, first week plants were given just water, now 50% strenght solution, EC 1.4 ph 6.0, i am hydroponic grower for last 2 years and never had this problem, really dont know what is wrong and what to do, my plants look like they are dying plz help me! thanks