2 X OG Kush in NFT45 litre. on PH'd(6.5) water, were nice yesterday, today looking yellowed and drying of leaves. Quite precise temp control(88 F light at 2 .5 feet. mmmm , used ph down to ph my left out for a day or two tapwater. they are in jiffy 7 pellet rooted 2 - 3 inches out of jiff7...