Ok guys, please help! I have a funny feeling this could be due to temp fluctuations beyond my control (this isn't happening now). can this be fixed?do I need something to treat them?will they heal? the temp int he room now is about 24-26 degrees C. my water temp is about 21 degrees C which is really annoying as I cant seem to get it down and after about 3/4 days the water starts to smell weird...this cant be normal? the leaves haven't hardened up they are just curling. The humidity is 30%, the ppm is around 500 using AN PH perfect sensi grow and rootjuice. my ph is at 5.5-5.7 and they are in 21L buckets DWC. All help or advice will be appreciated as im freaking out!!!!! 
budie