Yeah, just switched to 12\12, and started using a 300-500ppm nutrient solution as well. Tops are coming up very light lime green, however growing has increased. I also have the leaves drooping, however I think I can now say that is overwatering. I flushed it with 500mL of water to help drain off excess nutrients.

Anyone know of a different problem I might be experiencing:
- light lime green new growth two leaf sets back
- drooping new growth, yet old growth still seems ok?