The yellowing leaves, if you notice, are the bottom leaves, or the old ones. They used up their nutrients to give life to the clone by helping to produce roots. You can also see the end of the leaves cut across by scissors, which is often done during to cloning process. You should carefully cut those off, as long as you can see new growth elsewhere. Those that are like that are lagging behind because they are trying to 'repair' those leaves rather than produce new growth.
SpaceNeedle Reviewed by SpaceNeedle on . Hydro top feed drip grow? Input please... Alright this is my first time so here it goes. Ill give the specs and hopefully some pics later. Strain: Cantelope Haze, clones Weeks in: 3 Light: 1000 watt HPS, suspended 4 ft above babies at the moment Temp: 80 F, definitely high (getting a fan today) Humidity: ? Substrate: Hydroton Nutes: General hydroponics (using gro and flora micro, running 1/4 tsp per gallon as directed for clones/cutting PH: maintained at 5.8-6.0, keeps on going up (more basic) everyday reasons? Rating: 5