help i am a new grower,and dont really know what ia doing.
i have a nft system just need to know why my plants that keep getting dry yellow leaves and low yield
here are some stats
my plants are clones
temp : 75 to 85 f
humidity :40 % (my night time can be 75%)
strenth : 16
ph :6.1
12 hrs light

need to know whats best water temp and what night time humid/temp is best