Hello everyone I have a 400w hps in a 2x2x5 tent with a growlush exhaust fan unsure of cfm and bubbleponics system with aircon going straight in the tent I germinated my seeds put them in rockwool after soaking them in 5.8 ph water and put the rockwool in clay balls turned my lights on 18/6 and left them be except ph the water ever day my temps are 23 degrees Celsius on 73 d/f and 18 degrees of 64 d/f off the seed sprouted and looked happy then I woke up this morning and it's drooping my light is 18 inches away so it's not hot what have I done wrong? No nutes added